oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002
oid8_opsoid8_opsbtree\u662f\u65e0oid8| \u7b56\u7565\u7f16\u53f7 | \u7528\u9014 | \u8fd0\u7b97\u7b26 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf |
|---|---|---|---|---|---|
1 | \u641c\u7d22 | <(oid8,oid8) | oid8 | oid8 | |
2 | \u641c\u7d22 | <=(oid8,oid8) | oid8 | oid8 | |
3 | \u641c\u7d22 | =(oid8,oid8) | oid8 | oid8 | |
4 | \u641c\u7d22 | >=(oid8,oid8) | oid8 | oid8 | |
5 | \u641c\u7d22 | >(oid8,oid8) | oid8 | oid8 | |
| \u652f\u6301\u51fd\u6570\u7f16\u53f7 | \u5b9e\u73b0\u51fd\u6570 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u7ed3\u679c\u7c7b\u578b |
|---|---|---|---|---|
1 | btoid8cmp(oid8,oid8) | oid8 | oid8 | int4 |
2 | btoid8sortsupport(internal) | oid8 | oid8 | void |
4 | btequalimage(oid) | oid8 | oid8 | bool |
6 | btoid8skipsupport(internal) | oid8 | oid8 | void |
\n \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u3002\n
\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 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\u3001ASC/DESC \u548c/\u6216 NULLS FIRST/NULLS LAST \u6765\u4fee\u6539\uff09\u3002\n
\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
\n \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002", "version": "19", "link_map": {"/zh/docs/19/indexes-opclass.html": "/docs/19/indexes-opclass.html"}, "body_html": "oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002
oid8_opsoid8_opsbtree\u662f\u65e0oid8| \u7b56\u7565\u7f16\u53f7 | \u7528\u9014 | \u8fd0\u7b97\u7b26 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf |
|---|---|---|---|---|---|
1 | \u641c\u7d22 | <(oid8,oid8) | oid8 | oid8 | |
2 | \u641c\u7d22 | <=(oid8,oid8) | oid8 | oid8 | |
3 | \u641c\u7d22 | =(oid8,oid8) | oid8 | oid8 | |
4 | \u641c\u7d22 | >=(oid8,oid8) | oid8 | oid8 | |
5 | \u641c\u7d22 | >(oid8,oid8) | oid8 | oid8 | |
| \u652f\u6301\u51fd\u6570\u7f16\u53f7 | \u5b9e\u73b0\u51fd\u6570 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u7ed3\u679c\u7c7b\u578b |
|---|---|---|---|---|
1 | btoid8cmp(oid8,oid8) | oid8 | oid8 | int4 |
2 | btoid8sortsupport(internal) | oid8 | oid8 | void |
4 | btequalimage(oid) | oid8 | oid8 | bool |
6 | btoid8skipsupport(internal) | oid8 | oid8 | void |
\n \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u3002\n
\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 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\u3001ASC/DESC \u548c/\u6216 NULLS FIRST/NULLS LAST \u6765\u4fee\u6539\uff09\u3002\n
\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
\n \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
", "body_sha256": "20fa63925f576a7f80d2f4806cef09bf290b0d60770ec2f68b27c0ea792f9bf0", "content_hash": "117624ec8093dc908cb33fba3cbbedc5ea6e23fc56c5b16b5b201a6eac8e1aa4", "source_database": "center", "source_revision": "af105fc8e960fc836a09fc2cd7f582b49fd17675d9d36631abe3a565bfd7d701"}, "operators": [{"family": "oid8_ops", "method": "btree", "purpose": "search", "operator": "<(oid8,oid8)", "strategy": "1", "left_type": "oid8", "right_type": "oid8", "description": "less than", "family_slug": "family-btree-oid8_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c-oid8-oid8", "sort_family_slug": ""}, {"family": "oid8_ops", "method": "btree", "purpose": "search", "operator": "<=(oid8,oid8)", "strategy": "2", "left_type": "oid8", "right_type": "oid8", "description": "less than or equal", "family_slug": "family-btree-oid8_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3c3d-oid8-oid8", "sort_family_slug": ""}, {"family": "oid8_ops", "method": "btree", "purpose": "search", "operator": "=(oid8,oid8)", "strategy": "3", "left_type": "oid8", "right_type": "oid8", "description": "equal", "family_slug": "family-btree-oid8_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3d-oid8-oid8", "sort_family_slug": ""}, {"family": "oid8_ops", "method": "btree", "purpose": "search", "operator": ">=(oid8,oid8)", "strategy": "4", "left_type": "oid8", "right_type": "oid8", "description": "greater than or equal", "family_slug": "family-btree-oid8_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e3d-oid8-oid8", "sort_family_slug": ""}, {"family": "oid8_ops", "method": "btree", "purpose": "search", "operator": ">(oid8,oid8)", "strategy": "5", "left_type": "oid8", "right_type": "oid8", "description": "greater than", "family_slug": "family-btree-oid8_ops", "result_type": "bool", "sort_family": "", "operator_slug": "op-3e-oid8-oid8", "sort_family_slug": ""}], "signature": "btree/oid8_ops", "tables_zh": [{"key": "operators", "rows": [{"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-oid8-oid8/?v=19", "text": "<(oid8,oid8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-oid8-oid8/?v=19", "text": "<=(oid8,oid8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-oid8-oid8/?v=19", "text": "=(oid8,oid8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-oid8-oid8/?v=19", "text": ">=(oid8,oid8)"}, "strategy": "4", "description": 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"btoid8sortsupport(internal)", "left_type": {"url": "/wiki/type/oid8/?v=19", "text": "oid8"}, "right_type": {"url": "/wiki/type/oid8/?v=19", "text": "oid8"}, "result_type": "void"}, {"number": "4", "function": "btequalimage(oid)", "left_type": {"url": "/wiki/type/oid8/?v=19", "text": "oid8"}, "right_type": {"url": "/wiki/type/oid8/?v=19", "text": "oid8"}, "result_type": "bool"}, {"number": "6", "function": "btoid8skipsupport(internal)", "left_type": {"url": "/wiki/type/oid8/?v=19", "text": "oid8"}, "right_type": {"url": "/wiki/type/oid8/?v=19", "text": "oid8"}, "result_type": "void"}], "title": "\u5bb6\u65cf\u652f\u6301\u51fd\u6570", "columns": [{"key": "number", "label": "\u652f\u6301\u51fd\u6570\u7f16\u53f7"}, {"key": "left_type", "label": "\u5de6\u4fa7\u7c7b\u578b"}, {"key": "right_type", "label": "\u53f3\u4fa7\u7c7b\u578b"}, {"key": "function", "label": "\u51fd\u6570\u7b7e\u540d"}, {"key": "result_type", "label": "\u8fd4\u56de\u7c7b\u578b"}]}, {"key": "classes", "rows": [{"class": {"url": "/wiki/opclass/class-btree-oid8_ops/?v=19", "text": "oid8_ops"}, "default": "\u662f", "key_type": "Same as input type", "input_type": {"url": "/wiki/type/oid8/?v=19", "text": "oid8"}}], "title": "\u672c\u5bb6\u65cf\u7684\u64cd\u4f5c\u7b26\u7c7b", "columns": [{"key": "class", "label": "\u64cd\u4f5c\u7b26\u7c7b"}, {"key": "input_type", "label": "\u8f93\u5165\u7c7b\u578b"}, {"key": "key_type", "label": "\u952e\u7c7b\u578b"}, {"key": "default", "label": "\u9ed8\u8ba4\u503c"}]}], "source_oid": "", "description": ["oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002"], "sections_zh": [{"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 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|---|---|---|---|---|---|
1 | \u641c\u7d22 | <(oid8,oid8) | oid8 | oid8 | |
2 | \u641c\u7d22 | <=(oid8,oid8) | oid8 | oid8 | |
3 | \u641c\u7d22 | =(oid8,oid8) | oid8 | oid8 | |
4 | \u641c\u7d22 | >=(oid8,oid8) | oid8 | oid8 | |
5 | \u641c\u7d22 | >(oid8,oid8) | oid8 | oid8 | |
| \u652f\u6301\u51fd\u6570\u7f16\u53f7 | \u5b9e\u73b0\u51fd\u6570 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u7ed3\u679c\u7c7b\u578b |
|---|---|---|---|---|
1 | btoid8cmp(oid8,oid8) | oid8 | oid8 | int4 |
2 | btoid8sortsupport(internal) | oid8 | oid8 | void |
4 | btequalimage(oid) | oid8 | oid8 | bool |
6 | btoid8skipsupport(internal) | oid8 | oid8 | void |
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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": "oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002", "description_zh_html": "oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002
oid8_opsoid8_opsbtree\u662f\u65e0oid8| \u7b56\u7565\u7f16\u53f7 | \u7528\u9014 | \u8fd0\u7b97\u7b26 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf |
|---|---|---|---|---|---|
1 | \u641c\u7d22 | <(oid8,oid8) | oid8 | oid8 | |
2 | \u641c\u7d22 | <=(oid8,oid8) | oid8 | oid8 | |
3 | \u641c\u7d22 | =(oid8,oid8) | oid8 | oid8 | |
4 | \u641c\u7d22 | >=(oid8,oid8) | oid8 | oid8 | |
5 | \u641c\u7d22 | >(oid8,oid8) | oid8 | oid8 | |
| \u652f\u6301\u51fd\u6570\u7f16\u53f7 | \u5b9e\u73b0\u51fd\u6570 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u7ed3\u679c\u7c7b\u578b |
|---|---|---|---|---|
1 | btoid8cmp(oid8,oid8) | oid8 | oid8 | int4 |
2 | btoid8sortsupport(internal) | oid8 | oid8 | void |
4 | btequalimage(oid) | oid8 | oid8 | bool |
6 | btoid8skipsupport(internal) | oid8 | oid8 | void |
\n \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u3002\n
\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 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\u3001ASC/DESC \u548c/\u6216 NULLS FIRST/NULLS LAST \u6765\u4fee\u6539\uff09\u3002\n
\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
\n \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
"}, "summary": "oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002", "version": "20", "link_map": {"/zh/docs/devel/indexes-opclass.html": "/docs/devel/indexes-opclass.html"}, "body_html": "oid8_ops \u662f btree \u7684\u8fd0\u7b97\u7b26\u7c7b\u3002
oid8_opsoid8_opsbtree\u662f\u65e0oid8| \u7b56\u7565\u7f16\u53f7 | \u7528\u9014 | \u8fd0\u7b97\u7b26 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf |
|---|---|---|---|---|---|
1 | \u641c\u7d22 | <(oid8,oid8) | oid8 | oid8 | |
2 | \u641c\u7d22 | <=(oid8,oid8) | oid8 | oid8 | |
3 | \u641c\u7d22 | =(oid8,oid8) | oid8 | oid8 | |
4 | \u641c\u7d22 | >=(oid8,oid8) | oid8 | oid8 | |
5 | \u641c\u7d22 | >(oid8,oid8) | oid8 | oid8 | |
| \u652f\u6301\u51fd\u6570\u7f16\u53f7 | \u5b9e\u73b0\u51fd\u6570 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u7ed3\u679c\u7c7b\u578b |
|---|---|---|---|---|
1 | btoid8cmp(oid8,oid8) | oid8 | oid8 | int4 |
2 | btoid8sortsupport(internal) | oid8 | oid8 | void |
4 | btequalimage(oid) | oid8 | oid8 | bool |
6 | btoid8skipsupport(internal) | oid8 | oid8 | void |
\n \u4e00\u4e2a\u7d22\u5f15\u5b9a\u4e49\u53ef\u4ee5\u4e3a\u7d22\u5f15\u7684\u6bcf\u4e00\u5217\u6307\u5b9a\u4e00\u4e2a\u64cd\u4f5c\u7b26\u7c7b\u3002\n
\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 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\u3001ASC/DESC \u548c/\u6216 NULLS FIRST/NULLS LAST \u6765\u4fee\u6539\uff09\u3002\n
\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
\n \u4e0b\u9762\u7684\u67e5\u8be2\u4f1a\u663e\u793a\u6240\u6709\u5df2\u5b9a\u4e49\u7684\u64cd\u4f5c\u7b26\u7c7b\uff1a\n\n
\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
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"operators", "rows": [{"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c-oid8-oid8/?v=20", "text": "<(oid8,oid8)"}, "strategy": "1", "description": "\u5c0f\u4e8e", "sort_family": ""}, {"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3c3d-oid8-oid8/?v=20", "text": "<=(oid8,oid8)"}, "strategy": "2", "description": "\u5c0f\u4e8e\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3d-oid8-oid8/?v=20", "text": "=(oid8,oid8)"}, "strategy": "3", "description": "\u7b49\u4e8e", "sort_family": ""}, {"scope": "\u64cd\u4f5c\u7b26\u7c7b\u8f93\u5165\u7c7b\u578b\u5bf9", "purpose": "\u641c\u7d22", "operator": {"url": "/wiki/operator/op-3e3d-oid8-oid8/?v=20", "text": ">=(oid8,oid8)"}, "strategy": "4", "description": 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For example, a B-tree index on the type int4 would use the int4_ops class; this operator class includes comparison functions for values of type int4 . In practice the default operator class for the column's data type is usually sufficient. The main reason for having operator classes is that for some data types, there could be more than one meaningful index behavior. For example, we might want to sort a complex-number data type either by absolute value or by real part. We could do this by defining two operator classes for the data type and then selecting the proper class when making an index. 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oid8_opsoid8_opsbtree\u662f\u65e0oid8| \u7b56\u7565\u7f16\u53f7 | \u7528\u9014 | \u8fd0\u7b97\u7b26 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u6392\u5e8f\u8fd0\u7b97\u7b26\u65cf |
|---|---|---|---|---|---|
1 | \u641c\u7d22 | <(oid8,oid8) | oid8 | oid8 | |
2 | \u641c\u7d22 | <=(oid8,oid8) | oid8 | oid8 | |
3 | \u641c\u7d22 | =(oid8,oid8) | oid8 | oid8 | |
4 | \u641c\u7d22 | >=(oid8,oid8) | oid8 | oid8 | |
5 | \u641c\u7d22 | >(oid8,oid8) | oid8 | oid8 | |
| \u652f\u6301\u51fd\u6570\u7f16\u53f7 | \u5b9e\u73b0\u51fd\u6570 | \u5de6\u64cd\u4f5c\u6570\u7c7b\u578b | \u53f3\u64cd\u4f5c\u6570\u7c7b\u578b | \u7ed3\u679c\u7c7b\u578b |
|---|---|---|---|---|
1 | btoid8cmp(oid8,oid8) | oid8 | oid8 | int4 |
2 | btoid8sortsupport(internal) | oid8 | oid8 | void |
4 | btequalimage(oid) | oid8 | oid8 | bool |
6 | btoid8skipsupport(internal) | oid8 | oid8 | void |
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\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
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\u67e5\u770b\u5b8c\u6574\u4e2d\u6587\u624b\u518c\u4e0e\u4e0a\u4e0b\u6587\u3002
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