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"translated_from_revision": null}, "body_sha256": "fbb965b836cd51d215cce6cdca80c67dc249ae593c21af99a72a8b58c8155c98", "runtime_rerun": false, "authored_translation": "source-derived-structured-summary", "source_facts_revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "sections": [{"title": "\u64cd\u4f5c\u7b26\u7c7b\u4e0e\u5bb6\u65cf", "paragraphs": ["\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a \u64cd\u4f5c\u7b26\u7c7b \u3002", "\u64cd\u4f5c\u7b26\u7c7b\u786e\u5b9a\u7d22\u5f15\u9488\u5bf9\u8be5\u5217\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u5efa\u7acb\u5728\u7c7b\u578b int4 \u4e0a\u7684 B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 int4_ops \u7c7b\uff1b\u8be5\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u9488\u5bf9\u4ee5\u4e0b\u7c7b\u578b\u7684\u503c\u7684\u6bd4\u8f83\u51fd\u6570\uff1a int4 \u3002\u5b9e\u9645\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5c31\u8db3\u591f\u4e86\u3002\u4e4b\u6240\u4ee5\u9700\u8981\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u4e8e\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u80fd\u5b58\u5728\u4e0d\u6b62\u4e00\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6216\u5b9e\u90e8\u5bf9\u590d\u6570\u6570\u636e\u7c7b\u578b\u6392\u5e8f\u3002\u53ef\u4ee5\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u7c7b\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u57fa\u672c\u6392\u5e8f\u987a\u5e8f\uff08\u968f\u540e\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879\u8fdb\u884c\u8c03\u6574\uff1a COLLATE \uff0c ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002</p><p>\u64cd\u4f5c\u7b26\u7c7b\u786e\u5b9a\u7d22\u5f15\u9488\u5bf9\u8be5\u5217\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u5efa\u7acb\u5728\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684 B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8be5\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u9488\u5bf9\u4ee5\u4e0b\u7c7b\u578b\u7684\u503c\u7684\u6bd4\u8f83\u51fd\u6570\uff1a<code class=\"type\">int4</code>\u3002\u5b9e\u9645\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5c31\u8db3\u591f\u4e86\u3002\u4e4b\u6240\u4ee5\u9700\u8981\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u4e8e\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u80fd\u5b58\u5728\u4e0d\u6b62\u4e00\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6216\u5b9e\u90e8\u5bf9\u590d\u6570\u6570\u636e\u7c7b\u578b\u6392\u5e8f\u3002\u53ef\u4ee5\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u7c7b\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u57fa\u672c\u6392\u5e8f\u987a\u5e8f\uff08\u968f\u540e\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879\u8fdb\u884c\u8c03\u6574\uff1a<code class=\"literal\">COLLATE</code>\uff0c<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code>\uff09\u3002\n  </p><p>   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/10/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "10", "link_map": {"/zh/docs/10/indexes-opclass.html": "/docs/10/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002</p><p>\u64cd\u4f5c\u7b26\u7c7b\u786e\u5b9a\u7d22\u5f15\u9488\u5bf9\u8be5\u5217\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u5efa\u7acb\u5728\u7c7b\u578b <code>int4</code> \u4e0a\u7684 B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8be5\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u9488\u5bf9\u4ee5\u4e0b\u7c7b\u578b\u7684\u503c\u7684\u6bd4\u8f83\u51fd\u6570\uff1a<code>int4</code>\u3002\u5b9e\u9645\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5c31\u8db3\u591f\u4e86\u3002\u4e4b\u6240\u4ee5\u9700\u8981\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u4e8e\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\uff0c\u53ef\u80fd\u5b58\u5728\u4e0d\u6b62\u4e00\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6216\u5b9e\u90e8\u5bf9\u590d\u6570\u6570\u636e\u7c7b\u578b\u6392\u5e8f\u3002\u53ef\u4ee5\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u7c7b\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u57fa\u672c\u6392\u5e8f\u987a\u5e8f\uff08\u968f\u540e\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879\u8fdb\u884c\u8c03\u6574\uff1a<code>COLLATE</code>\uff0c<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code>\uff09\u3002\n  </p><p>   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/10/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "0c58b639dea2ddfc2283c542fcc9280c8e9293d21ebe3606a5e475f0c60d8bc7", "content_hash": "e40f998ac65b74c72f5c1133dc507e9a8a614802d7c5cabce858633560caf807", "source_database": "center", "source_revision": "94a4b2528372458e5662c18d406629266667c437198160a18cdfd2c4a4d6eee9"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float8)", "strategy": "2", "left_type": "float4", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float8)", "strategy": "3", "left_type": "float4", "right_type": "float8", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float8)", "strategy": "4", "left_type": "float4", "right_type": "float8", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float8)", 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"comparison_hash": "7a454fa82df912e409b288a9a5e1cf9f2a116b0d8542a7ba9557a8457044adde", "manual_language": "zh", "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,floa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<code>int4</code> \u4e0a\u7684 B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> 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\u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code>\uff09\u3002\n  </p><p>   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/10/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "11": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=11", "text": "<(float4,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": 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"\u64cd\u4f5c\u7b26\u7c7b\u4e0e\u5bb6\u65cf", "paragraphs": ["\u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a \u64cd\u4f5c\u7b26\u7c7b \u3002", "\u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b int4 \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 int4_ops \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 int4 \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/11/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "11", "link_map": {"/zh/docs/11/indexes-opclass.html": "/docs/11/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/11/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "a3970bdc157162d69eab4084a8a520309a00ae0b12ac9313213569a9ac23d516", "content_hash": "6392939d5efe1e5b297af49171903f8d4516aa91156a257eb4432dd71e60d058", "source_database": "center", "source_revision": "2cb7c97d7a0d7278851bbc9c61f467b69c094c72b81740b751108e7892ebe1f0"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", 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\u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/11/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "12": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=12", "text": "<(float4,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float4/?v=12", "text": "<=(float4,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float4/?v=12", "text": "=(float4,float4)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float4/?v=12", "text": ">=(float4,float4)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float4/?v=12", "text": ">(float4,float4)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float8/?v=12", "text": "<(float4,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float8/?v=12", "text": "<=(float4,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float8/?v=12", "text": "=(float4,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float8/?v=12", "text": ">=(float4,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float8/?v=12", "text": ">(float4,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float8/?v=12", "text": "<(float8,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float8-float8/?v=12", "text": "<=(float8,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float8-float8/?v=12", "text": "=(float8,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float8-float8/?v=12", "text": ">=(float8,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float8-float8/?v=12", "text": ">(float8,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float4/?v=12", "text": "<(float8,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float8-float4/?v=12", "text": "<=(float8,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float8-float4/?v=12", "text": "=(float8,float4)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float8-float4/?v=12", "text": ">=(float8,float4)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float8-float4/?v=12", "text": ">(float8,float4)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}], "title": "\u5bb6\u65cf\u4e2d\u7684\u64cd\u4f5c\u7b26\u7b56\u7565", "columns": [{"key": "operator", "label": "\u64cd\u4f5c\u7b26\u91cd\u8f7d"}, {"key": "strategy", "label": "\u7b56\u7565"}, {"key": "purpose", "label": "\u7528\u9014"}, {"key": "sort_family", "label": "\u6392\u5e8f\u5bb6\u65cf"}, {"key": "scope", "label": "\u6210\u5458\u8303\u56f4"}, {"key": "description", "label": "\u6e90\u7801\u8bf4\u660e"}]}, {"key": "support-functions", 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"\u9ed8\u8ba4\u503c"}]}], "zh_from": {"kind": "same-version-chinese-manual-with-source-derived-structured-summary", "manual": {"url": "/zh/docs/12/indexes-opclass.html", "anchor": "", "locale": "zh-Hans", "version": "12", "build_id": 65, "page_key": "indexes-opclass.html", "extraction": "concept-introduction", "source_hash": "9e99e81f1c125188bfc1f1d0a61066939ae3307e6311b04025d5cf658d2aa430", "fragment_sha256": "dad5545190ebde655fce48dfc13cd02d2863166fac7cf0c2b28b059c9e419ae4", "source_revision": "unknown:rendered-translation-baseline", "translation_revision": "snapshot:sha256:86d2ff781f93e1de17122ebc514d5e64fcb63fed15941f496d7e146c6dcc7a49", "translated_from_revision": null}, "body_sha256": "a90d409e9b156222729d6648d76664b33f73bd0a4cd2b5af2dd93f6875ba2488", "runtime_rerun": false, "authored_translation": "source-derived-structured-summary", "source_facts_revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "sections": [{"title": "\u64cd\u4f5c\u7b26\u7c7b\u4e0e\u5bb6\u65cf", "paragraphs": ["\u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a \u64cd\u4f5c\u7b26\u7c7b \u3002", "\u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b int4 \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 int4_ops \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 int4 \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/12/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "12", "link_map": {"/zh/docs/12/indexes-opclass.html": "/docs/12/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/12/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "ddd220b9ada17a30d844cc7bd5b63fae23b915e138f8c9c28c9f07ed6ddfc2e4", "content_hash": "3d7c5f862e7b44ad3f038bcb70480bd8e8cbc2c96bb465ec366a4e6a467594a3", "source_database": "center", "source_revision": "8df3c0474782589d3c6f374b5133b1bd14d168086edbc13c6e72e67dd4527a3b"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float8)", "strategy": "2", "left_type": "float4", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float8)", "strategy": "3", "left_type": "float4", "right_type": "float8", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float8)", "strategy": "4", "left_type": "float4", "right_type": "float8", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float8)", "strategy": "5", "left_type": "float4", "right_type": "float8", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float8-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float8-float8", 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"function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/12/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "13": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=13", "text": 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\u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/13/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "13", "link_map": {"/zh/docs/13/indexes-opclass.html": "/docs/13/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/13/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "26b91a517f896aa0f019e64ed5426211f4de10caca1d9fac7a0cc9cb2e2e50af", "content_hash": "1b62197838e0207712bdcf8aba99ceaa2ec35dc45e18c6c1a53f4a36cef67048", "source_database": "center", "source_revision": "6ec3c82726af92b7dec873fa1cdf881eca92a4219787dfad05acb6b10e041fd6"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", 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">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float8)", "strategy": "2", "left_type": "float4", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float8)", "strategy": "3", "left_type": "float4", "right_type": "float8", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float8)", "strategy": "4", "left_type": "float4", "right_type": "float8", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float8)", "strategy": "5", "left_type": "float4", "right_type": "float8", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float8-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float8-float8", 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"operator_slug": "op-3d-float8-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float8,float4)", "strategy": "4", "left_type": "float8", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float8-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float8,float4)", "strategy": "5", "left_type": "float8", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float8-float4", "sort_family_slug": ""}], "signature": "btree/float_ops", "tables_zh": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=13", "text": "<(float4,float4)"}, 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"method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float8,float8)", "strategy": "3", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float8,float8)", "strategy": "4", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float8,float8)", "strategy": "5", "left_type": "float8", "right_type": "float8", "sort_family": ""}], "attributes": {"name": "float_ops", "method": "btree"}, "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "result_type": "bool"}]}, "comparison_hash": "187596285e658895ea7e6a6dc51bd35f25855a24bf5766a1cc0b3e0652392e85", "manual_language": "zh", "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/13/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "14": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=14", "text": 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[{"title": "\u64cd\u4f5c\u7b26\u7c7b\u4e0e\u5bb6\u65cf", "paragraphs": ["\u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a \u64cd\u4f5c\u7b26\u7c7b \u3002", "\u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b int4 \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 int4_ops \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 int4 \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/14/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "14", "link_map": {"/zh/docs/14/indexes-opclass.html": "/docs/14/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/14/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "c5444cfb3fb4988e0efd6b9c6fbef12959b371a7efe98bf5ddde84ce0d3fc12c", "content_hash": "fd03b7198b07022de25e44277e054130a07786e7724fc61823cfae4b1edac090", "source_database": "center", "source_revision": "a7fa7ed3d558172355f51406097a7bd4f6b473be80f311ef7cda96bf383d8897"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", 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"/versions/14/tables/1/columns/4/label": "Result type", "/versions/14/tables/2/columns/0/label": "Class", "/versions/14/tables/2/columns/1/label": "Input type", "/versions/14/tables/2/columns/2/label": "Key type", "/versions/14/tables/2/columns/3/label": "Default", "/versions/14/tables/2/rows/0/key_type": "Same as input type", "/versions/14/tables/2/rows/1/key_type": "Same as input type", "/versions/14/tables/0/rows/0/description": "less than", "/versions/14/tables/0/rows/1/description": "less than or equal", "/versions/14/tables/0/rows/2/description": "equal", "/versions/14/tables/0/rows/3/description": "greater than or equal", "/versions/14/tables/0/rows/4/description": "greater than", "/versions/14/tables/0/rows/5/description": "less than", "/versions/14/tables/0/rows/6/description": "less than or equal", "/versions/14/tables/0/rows/7/description": "equal", "/versions/14/tables/0/rows/8/description": "greater than or equal", "/versions/14/tables/0/rows/9/description": "greater 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"number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, 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"function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/14/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "15": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=15", "text": "<(float4,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float4/?v=15", "text": "<=(float4,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float4/?v=15", "text": "=(float4,float4)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float4/?v=15", "text": ">=(float4,float4)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float4/?v=15", "text": ">(float4,float4)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float8/?v=15", "text": "<(float4,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float8/?v=15", "text": "<=(float4,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float8/?v=15", "text": "=(float4,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float8/?v=15", "text": ">=(float4,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float8/?v=15", "text": ">(float4,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float8/?v=15", "text": "<(float8,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float8-float8/?v=15", "text": "<=(float8,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float8-float8/?v=15", "text": "=(float8,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float8-float8/?v=15", "text": ">=(float8,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float8-float8/?v=15", "text": ">(float8,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float4/?v=15", "text": "<(float8,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float8-float4/?v=15", "text": "<=(float8,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float8-float4/?v=15", "text": 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\u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/15/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "15", "link_map": {"/zh/docs/15/indexes-opclass.html": "/docs/15/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/15/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "f0d277c75bc75c9649a5cdcd5dcd91310443a44ba900a987c928b08304241f4a", "content_hash": "2ebeb31eb35f2b67b26d848b9a037e074f3914ab4e6da9e88773ef9212d71ce2", "source_database": "center", "source_revision": "e1a64a87a46b825b88c082e4518161a47aab53c45694964f8ba1df28f7859f89"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float8)", "strategy": "2", "left_type": "float4", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float8)", "strategy": "3", "left_type": "float4", "right_type": "float8", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float8)", "strategy": "4", "left_type": "float4", "right_type": "float8", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float8)", "strategy": "5", "left_type": "float4", "right_type": "float8", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float8-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float8-float8", 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"method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float8,float8)", "strategy": "3", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float8,float8)", "strategy": "4", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float8,float8)", "strategy": "5", "left_type": "float8", "right_type": "float8", "sort_family": ""}], "attributes": {"name": "float_ops", "method": "btree"}, "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "result_type": "bool"}]}, "comparison_hash": "187596285e658895ea7e6a6dc51bd35f25855a24bf5766a1cc0b3e0652392e85", "manual_language": "zh", "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/15/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "16": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=16", "text": 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[{"title": "\u64cd\u4f5c\u7b26\u7c7b\u4e0e\u5bb6\u65cf", "paragraphs": ["\u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a \u64cd\u4f5c\u7b26\u7c7b \u3002", "\u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b int4 \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 int4_ops \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 int4 \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/16/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "16", "link_map": {"/zh/docs/16/indexes-opclass.html": "/docs/16/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/16/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "4370567558cc15c586e538bd6165c981a46a90530723a39a1e92580079322975", "content_hash": "ccf171a1c5531a11e15c93593d154b8b3fab0c944f75ac9580686177d3282314", "source_database": "center", "source_revision": "c1575341fa7bd40f5274ea465b34390f4dc64cdd0770af327005caaeb9f6b7ed"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", 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"/versions/16/tables/1/columns/4/label": "Result type", "/versions/16/tables/2/columns/0/label": "Class", "/versions/16/tables/2/columns/1/label": "Input type", "/versions/16/tables/2/columns/2/label": "Key type", "/versions/16/tables/2/columns/3/label": "Default", "/versions/16/tables/2/rows/0/key_type": "Same as input type", "/versions/16/tables/2/rows/1/key_type": "Same as input type", "/versions/16/tables/0/rows/0/description": "less than", "/versions/16/tables/0/rows/1/description": "less than or equal", "/versions/16/tables/0/rows/2/description": "equal", "/versions/16/tables/0/rows/3/description": "greater than or equal", "/versions/16/tables/0/rows/4/description": "greater than", "/versions/16/tables/0/rows/5/description": "less than", "/versions/16/tables/0/rows/6/description": "less than or equal", "/versions/16/tables/0/rows/7/description": "equal", "/versions/16/tables/0/rows/8/description": "greater than or equal", "/versions/16/tables/0/rows/9/description": "greater 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"number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, 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"function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/16/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "17": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=17", "text": "<(float4,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float4/?v=17", "text": "<=(float4,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float4/?v=17", "text": "=(float4,float4)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float4/?v=17", "text": ">=(float4,float4)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float4/?v=17", "text": ">(float4,float4)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float8/?v=17", "text": "<(float4,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float8/?v=17", "text": "<=(float4,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float8/?v=17", "text": "=(float4,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float8/?v=17", "text": ">=(float4,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float8/?v=17", "text": ">(float4,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float8/?v=17", "text": "<(float8,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float8-float8/?v=17", "text": "<=(float8,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float8-float8/?v=17", "text": "=(float8,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float8-float8/?v=17", "text": ">=(float8,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float8-float8/?v=17", "text": ">(float8,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float4/?v=17", "text": "<(float8,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float8-float4/?v=17", "text": "<=(float8,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float8-float4/?v=17", "text": 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\u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/17/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "17", "link_map": {"/zh/docs/17/indexes-opclass.html": "/docs/17/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/17/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "7c4ba8549bf9c06a180326c9aee9991e29ab92b4f0973f5bed30fbdd00b5857e", "content_hash": "c8992f164b661a0ce7c883a276c7564158d97546775cc79178889694f0bd24ca", "source_database": "center", "source_revision": "dd27f2b3c59e73ed14aa3324901242bf69a032a6347805f274e6260322d42979"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float8)", "strategy": "2", "left_type": "float4", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float8)", "strategy": "3", "left_type": "float4", "right_type": "float8", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float8)", "strategy": "4", "left_type": "float4", "right_type": "float8", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float8)", "strategy": "5", "left_type": "float4", "right_type": "float8", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float8-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float8-float8", 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"operator_slug": "op-3d-float8-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float8,float4)", "strategy": "4", "left_type": "float8", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float8-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float8,float4)", "strategy": "5", "left_type": "float8", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float8-float4", "sort_family_slug": ""}], "signature": "btree/float_ops", "tables_zh": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=17", "text": "<(float4,float4)"}, 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"method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float8,float8)", "strategy": "3", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float8,float8)", "strategy": "4", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float8,float8)", "strategy": "5", "left_type": "float8", "right_type": "float8", "sort_family": ""}], "attributes": {"name": "float_ops", "method": "btree"}, "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "result_type": "bool"}]}, "comparison_hash": "187596285e658895ea7e6a6dc51bd35f25855a24bf5766a1cc0b3e0652392e85", "manual_language": "zh", "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/17/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "18": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=18", "text": 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[{"title": "\u64cd\u4f5c\u7b26\u7c7b\u4e0e\u5bb6\u65cf", "paragraphs": ["\u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a \u64cd\u4f5c\u7b26\u7c7b \u3002", "\u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b int4 \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 int4_ops \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 int4 \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/18/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "18", "link_map": {"/zh/docs/18/indexes-opclass.html": "/docs/18/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/18/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "9e2a6d069e9e6536ed4e526b1015bdacb31632025c774acde5f385ff47fb44b7", "content_hash": "4069ffe4f492138ddd6e91902a8f3e80ea7004a3422f99f28fe83a978c025878", "source_database": "center", "source_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", 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"/versions/18/tables/1/columns/4/label": "Result type", "/versions/18/tables/2/columns/0/label": "Class", "/versions/18/tables/2/columns/1/label": "Input type", "/versions/18/tables/2/columns/2/label": "Key type", "/versions/18/tables/2/columns/3/label": "Default", "/versions/18/tables/2/rows/0/key_type": "Same as input type", "/versions/18/tables/2/rows/1/key_type": "Same as input type", "/versions/18/tables/0/rows/0/description": "less than", "/versions/18/tables/0/rows/1/description": "less than or equal", "/versions/18/tables/0/rows/2/description": "equal", "/versions/18/tables/0/rows/3/description": "greater than or equal", "/versions/18/tables/0/rows/4/description": "greater than", "/versions/18/tables/0/rows/5/description": "less than", "/versions/18/tables/0/rows/6/description": "less than or equal", "/versions/18/tables/0/rows/7/description": "equal", "/versions/18/tables/0/rows/8/description": "greater than or equal", "/versions/18/tables/0/rows/9/description": "greater 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"number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, 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"function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/18/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "center_zh_rendered": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/docs/18/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "19": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=19", "text": "<(float4,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float4/?v=19", "text": "<=(float4,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float4/?v=19", "text": "=(float4,float4)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float4/?v=19", "text": ">=(float4,float4)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float4/?v=19", "text": ">(float4,float4)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float8/?v=19", "text": "<(float4,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float8/?v=19", "text": "<=(float4,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float8/?v=19", "text": "=(float4,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float8/?v=19", "text": ">=(float4,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": 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"source_facts_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "sections": [{"title": "\u64cd\u4f5c\u7b26\u7c7b\u4e0e\u5bb6\u65cf", "paragraphs": ["\u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a \u64cd\u4f5c\u7b26\u7c7b \u3002", "\u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b int4 \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 int4_ops \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 int4 \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/19/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "19", "link_map": {"/zh/docs/19/indexes-opclass.html": "/docs/19/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/19/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "5b90ef4adcb720d084f1549484d2d3c715e252ce3df007078f1404c831ff1bcc", "content_hash": "340d6f6180464b1cc8c767e43de2c2acae2f6d693047deb200c6cd44dc87a3a8", "source_database": "center", "source_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float8)", "strategy": "2", "left_type": "float4", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float8)", "strategy": "3", "left_type": "float4", "right_type": "float8", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float8)", "strategy": "4", "left_type": "float4", "right_type": "float8", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float8", "sort_family_slug": ""}, {"family": 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"number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, 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"function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/19/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "source_revalidation": {"kind": "static-same-version-source-and-manual-replay", "audit": "wiki-audit-20261023", "runtime_rerun": false, "compared_fields": "entity membership and source-derived facts; presentation markup normalized", "source_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701", "previous_source_revision": "83157ee9c599d03b2f7a3d73ef3a56ec24e0e79cc2b3501a64d1364f56398c86"}}, "20": {"facts": [{"label": "\u5bf9\u8c61\u79cd\u7c7b", "value": "\u64cd\u4f5c\u7b26\u5bb6\u65cf"}, {"label": "\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5", "value": "B-tree"}], "family": {"name": "float_ops", "method": "btree"}, "tables": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=20", "text": "<(float4,float4)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float4/?v=20", "text": "<=(float4,float4)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float4/?v=20", "text": "=(float4,float4)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float4/?v=20", "text": ">=(float4,float4)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float4/?v=20", "text": ">(float4,float4)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float8/?v=20", "text": "<(float4,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float4-float8/?v=20", "text": "<=(float4,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float4-float8/?v=20", "text": "=(float4,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float4-float8/?v=20", "text": ">=(float4,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float4-float8/?v=20", "text": ">(float4,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float8/?v=20", "text": "<(float8,float8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-float8-float8/?v=20", "text": "<=(float8,float8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-float8-float8/?v=20", "text": "=(float8,float8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-float8-float8/?v=20", "text": ">=(float8,float8)"}, "strategy": "4", "description": "\u5927\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e-float8-float8/?v=20", "text": ">(float8,float8)"}, "strategy": "5", "description": "\u5927\u4e8e", "sort_family": ""}, {"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float8-float4/?v=20", "text": 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"\u5927\u4e8e", "sort_family": ""}], "title": "\u5bb6\u65cf\u4e2d\u7684\u64cd\u4f5c\u7b26\u7b56\u7565", "columns": [{"key": "operator", "label": "\u64cd\u4f5c\u7b26\u91cd\u8f7d"}, {"key": "strategy", "label": "\u7b56\u7565"}, {"key": "purpose", "label": "\u7528\u9014"}, {"key": "sort_family", "label": "\u6392\u5e8f\u5bb6\u65cf"}, {"key": "scope", "label": "\u6210\u5458\u8303\u56f4"}, {"key": "description", "label": "\u6e90\u7801\u8bf4\u660e"}]}, {"key": "support-functions", "rows": [{"number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": {"url": "/wiki/type/float4/?v=20", "text": "float4"}, "right_type": {"url": "/wiki/type/float4/?v=20", "text": "float4"}, "result_type": "int4"}, {"number": "2", "function": "btfloat4sortsupport(internal)", "left_type": {"url": "/wiki/type/float4/?v=20", "text": "float4"}, "right_type": {"url": "/wiki/type/float4/?v=20", "text": "float4"}, "result_type": "void"}, {"number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": 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\u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/devel/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "20", "link_map": {"/zh/docs/devel/indexes-opclass.html": "/docs/devel/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/devel/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "1b2a1be4dc397ed7d84ab59928329d9ef7775b77ce2dc683c6373c5d9b205be9", "content_hash": "85f9f6454c460f4f30607fc56388a585d54befec31b2c6126dbb30d53b8acb17", "source_database": "center", "source_revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", "strategy": "1", "left_type": "float4", "right_type": "float4", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float4)", "strategy": "2", "left_type": "float4", "right_type": "float4", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float4)", "strategy": "3", "left_type": "float4", "right_type": "float4", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float4)", "strategy": "4", "left_type": "float4", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float4)", "strategy": "5", "left_type": "float4", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float8)", "strategy": "1", "left_type": "float4", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float4,float8)", "strategy": "2", "left_type": "float4", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float4,float8)", "strategy": "3", "left_type": "float4", "right_type": "float8", "description": "equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float4,float8)", "strategy": "4", "left_type": "float4", "right_type": "float8", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float4,float8)", "strategy": "5", "left_type": "float4", "right_type": "float8", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float4-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "description": "less than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-float8-float8", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "description": "less than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-float8-float8", 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"operator_slug": "op-3d-float8-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float8,float4)", "strategy": "4", "left_type": "float8", "right_type": "float4", "description": "greater than or equal", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-float8-float4", "sort_family_slug": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float8,float4)", "strategy": "5", "left_type": "float8", "right_type": "float4", "description": "greater than", "family_slug": "family-btree-float_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-float8-float4", "sort_family_slug": ""}], "signature": "btree/float_ops", "tables_zh": [{"key": "operators", "rows": [{"scope": "\u5bb6\u65cf\u6210\u5458", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-float4-float4/?v=20", "text": "<(float4,float4)"}, 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"method": "btree", "purpose": "search", "operator": "<(float8,float8)", "strategy": "1", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<=(float8,float8)", "strategy": "2", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": "=(float8,float8)", "strategy": "3", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">=(float8,float8)", "strategy": "4", "left_type": "float8", "right_type": "float8", "sort_family": ""}, {"family": "float_ops", "method": "btree", "purpose": "search", "operator": ">(float8,float8)", "strategy": "5", "left_type": "float8", "right_type": "float8", "sort_family": ""}], "attributes": {"name": "float_ops", "method": "btree"}, "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "result_type": "bool"}]}, "comparison_hash": "187596285e658895ea7e6a6dc51bd35f25855a24bf5766a1cc0b3e0652392e85", "manual_language": "zh", "support_functions": [{"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat4cmp(float4,float4)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat4sortsupport(internal)", "left_type": "float4", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/devel/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "source_revalidation": {"kind": "static-same-version-source-and-manual-replay", "audit": "wiki-audit-20261023", "runtime_rerun": false, "compared_fields": "entity membership and source-derived facts; presentation markup normalized", "source_revision": "49c73aa4c9cacef8ca979276a28ac416c08e9e54c9baee4ae5fd116a35fa13ac", "previous_source_revision": 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COLLATE \u3001 ASC / DESC \u548c/\u6216 NULLS FIRST / NULLS LAST \u6765\u4fee\u6539\uff09\u3002", "\u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a"]}], "description_zh": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em class=\"firstterm\">\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code class=\"type\">int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code class=\"literal\">int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code class=\"type\">int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code class=\"literal\">COLLATE</code>\u3001<code class=\"literal\">ASC</code>/<code class=\"literal\">DESC</code> \u548c/\u6216 <code class=\"literal\">NULLS FIRST</code>/<code class=\"literal\">NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/18/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "summary": "float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002", "version": "18", "link_map": {"/zh/docs/18/indexes-opclass.html": "/docs/18/indexes-opclass.html"}, "body_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/18/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "body_sha256": "9e2a6d069e9e6536ed4e526b1015bdacb31632025c774acde5f385ff47fb44b7", "content_hash": "4069ffe4f492138ddd6e91902a8f3e80ea7004a3422f99f28fe83a978c025878", "source_database": "center", "source_revision": "555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f"}, "operators": [{"family": "float_ops", "method": "btree", "purpose": "search", "operator": "<(float4,float4)", 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"function": "btfloat48cmp(float4,float8)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat8cmp(float8,float8)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "2", "function": "btfloat8sortsupport(internal)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "void"}, {"family": "float_ops", "method": "btree", "number": "1", "function": "btfloat84cmp(float8,float4)", "left_type": "float8", "right_type": "float4", "family_slug": "family-btree-float_ops", "result_type": "int4"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float8,float8,float8,bool,bool)", "left_type": "float8", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}, {"family": "float_ops", "method": "btree", "number": "3", "function": "in_range(float4,float4,float8,bool,bool)", "left_type": "float4", "right_type": "float8", "family_slug": "family-btree-float_ops", "result_type": "bool"}], "description_zh_html": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/zh/docs/18/indexes-opclass.html\" rel=\"nofollow\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>", "center_zh_rendered": "<p>float_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u65cf\u3002</p><dl><dt>\u540d\u79f0</dt><dd><code>float_ops</code></dd><dt>\u7d22\u5f15\u8bbf\u95ee\u65b9\u6cd5</dt><dd><code>btree</code></dd></dl><h3>\u7b56\u7565\u8fd0\u7b97\u7b26</h3><table><thead><tr><th>\u7b56\u7565\u7f16\u53f7</th><th>\u7528\u9014</th><th>\u8fd0\u7b97\u7b26</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code></code></td></tr><tr><td><code>1</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>2</code></td><td><code>\u641c\u7d22</code></td><td><code>&lt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>3</code></td><td><code>\u641c\u7d22</code></td><td><code>=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>4</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;=(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr><tr><td><code>5</code></td><td><code>\u641c\u7d22</code></td><td><code>&gt;(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code></code></td></tr></tbody></table><h3>\u652f\u6301\u51fd\u6570</h3><table><thead><tr><th>\u652f\u6301\u51fd\u6570\u7f16\u53f7</th><th>\u5b9e\u73b0\u51fd\u6570</th><th>\u5de6\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u53f3\u64cd\u4f5c\u6570\u7c7b\u578b</th><th>\u7ed3\u679c\u7c7b\u578b</th></tr></thead><tbody><tr><td><code>1</code></td><td><code>btfloat4cmp(float4,float4)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat4sortsupport(internal)</code></td><td><code>float4</code></td><td><code>float4</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat48cmp(float4,float8)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>1</code></td><td><code>btfloat8cmp(float8,float8)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>int4</code></td></tr><tr><td><code>2</code></td><td><code>btfloat8sortsupport(internal)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>void</code></td></tr><tr><td><code>1</code></td><td><code>btfloat84cmp(float8,float4)</code></td><td><code>float8</code></td><td><code>float4</code></td><td><code>int4</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float8,float8,float8,bool,bool)</code></td><td><code>float8</code></td><td><code>float8</code></td><td><code>bool</code></td></tr><tr><td><code>3</code></td><td><code>in_range(float4,float4,float8,bool,bool)</code></td><td><code>float4</code></td><td><code>float8</code></td><td><code>bool</code></td></tr></tbody></table><h3>\u540c\u7248\u672c\u4e2d\u6587\u624b\u518c\u8282\u9009</h3><p>\n   \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a<em>\u64cd\u4f5c\u7b26\u7c7b</em>\u3002\n</p><p>\n   \u64cd\u4f5c\u7b26\u7c7b\u6807\u8bc6\u8be5\u7d22\u5f15\u5728\u8be5\u5217\u4e0a\u8981\u4f7f\u7528\u54ea\u4e9b\u64cd\u4f5c\u7b26\u3002\u4f8b\u5982\uff0c\u7c7b\u578b <code>int4</code> \u4e0a\u7684\u4e00\u4e2a B-\u6811\u7d22\u5f15\u4f1a\u4f7f\u7528 <code>int4_ops</code> \u7c7b\uff1b\u8fd9\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u5305\u542b\u5bf9 <code>int4</code> \u503c\u8fdb\u884c\u6bd4\u8f83\u6240\u9700\u7684\u51fd\u6570\u3002\u5b9e\u8df5\u4e2d\uff0c\u5217\u6570\u636e\u7c7b\u578b\u7684\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u901a\u5e38\u5df2\u7ecf\u8db3\u591f\u3002\u4e4b\u6240\u4ee5\u5b58\u5728\u64cd\u4f5c\u7b26\u7c7b\uff0c\u4e3b\u8981\u662f\u56e0\u4e3a\u5bf9\u67d0\u4e9b\u6570\u636e\u7c7b\u578b\u6765\u8bf4\uff0c\u53ef\u80fd\u5b58\u5728\u591a\u79cd\u6709\u610f\u4e49\u7684\u7d22\u5f15\u884c\u4e3a\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u80fd\u5e0c\u671b\u6309\u7edd\u5bf9\u503c\u6392\u5e8f\u4e00\u79cd\u590d\u6570\u6570\u636e\u7c7b\u578b\uff0c\u4e5f\u53ef\u80fd\u5e0c\u671b\u6309\u5b9e\u90e8\u6392\u5e8f\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4e3a\u8be5\u6570\u636e\u7c7b\u578b\u5b9a\u4e49\u4e24\u4e2a\u64cd\u4f5c\u7b26\u7c7b\uff0c\u5e76\u5728\u521b\u5efa\u7d22\u5f15\u65f6\u9009\u62e9\u5408\u9002\u7684\u90a3\u4e2a\u6765\u505a\u5230\u8fd9\u4e00\u70b9\u3002\u64cd\u4f5c\u7b26\u7c7b\u51b3\u5b9a\u4e86\u57fa\u7840\u6392\u5e8f\u987a\u5e8f\uff08\u4e4b\u540e\u8fd8\u53ef\u4ee5\u901a\u8fc7\u6dfb\u52a0\u6392\u5e8f\u9009\u9879 <code>COLLATE</code>\u3001<code>ASC</code>/<code>DESC</code> \u548c/\u6216 <code>NULLS FIRST</code>/<code>NULLS LAST</code> \u6765\u4fee\u6539\uff09\u3002\n  </p><p>\n   \u9664\u4e86\u9ed8\u8ba4\u64cd\u4f5c\u7b26\u7c7b\u4e4b\u5916\uff0c\u8fd8\u6709\u4e00\u4e9b\u5185\u7f6e\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n   </p><p>\n    \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n</p><p><a href=\"/docs/18/indexes-opclass.html\">\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587</a>\u3002</p>"}, "comparison": {"left": "10", "right": "11", "status": "changed", "diff": "--- PostgreSQL 10\n+++ PostgreSQL 11\n@@ -278,6 +278,24 @@\n       \"number\": \"2\",\n       \"result_type\": \"void\",\n       \"right_type\": \"float8\"\n+    },\n+    {\n+      \"family\": \"float_ops\",\n+      \"function\": \"in_range(float4,float4,float8,bool,bool)\",\n+      \"left_type\": \"float4\",\n+      \"method\": \"btree\",\n+      \"number\": \"3\",\n+      \"result_type\": \"bool\",\n+      \"right_type\": \"float8\"\n+    },\n+    {\n+      \"family\": \"float_ops\",\n+      \"function\": \"in_range(float8,float8,float8,bool,bool)\",\n+      \"left_type\": \"float8\",\n+      \"method\": \"btree\",\n+      \"number\": \"3\",\n+      \"result_type\": \"bool\",\n+      \"right_type\": \"float8\"\n     }\n   ]\n }"}}