brin/float_bloom_ops (family)

说明

BRIN 操作符家族 containing 2 classes, 2 operator strategies and 12 support functions in this source build。

对象种类

操作符家族

索引访问方法

BRIN

用法

brin/float_bloom_ops

操作符类与家族

一个索引定义可以为索引的每一列指定一个 操作符类 。

操作符类标识该索引在该列上要使用哪些操作符。例如，类型 int4 上的一个 B-树索引会使用 int4_ops 类；这个操作符类包含对 int4 值进行比较所需的函数。实践中，列数据类型的默认操作符类通常已经足够。之所以存在操作符类，主要是因为对某些数据类型来说，可能存在多种有意义的索引行为。例如，我们可能希望按绝对值排序一种复数数据类型，也可能希望按实部排序。我们可以通过为该数据类型定义两个操作符类，并在创建索引时选择合适的那个来做到这一点。操作符类决定了基础排序顺序（之后还可以通过添加排序选项 COLLATE 、 ASC / DESC 和/或 NULLS FIRST / NULLS LAST 来修改）。

除了默认操作符类之外，还有一些内置操作符类：

相关条目

• BRIN 索引访问方法

文档与源码

• Matching PostgreSQL source archive
• PostgreSQL 18 English manual: indexes-opclass.html
• PostgreSQL 18 English manual: catalog-pg-opfamily.html
• PostgreSQL 18 English manual: catalog-pg-amop.html
• PostgreSQL 18 English manual: catalog-pg-amproc.html

版本比较

PostgreSQL 13 → 14: 新增收录。

以下差异保留原始字段名与英文源描述。

--- PostgreSQL 13
+++ PostgreSQL 14
@@ -1 +1,157 @@
-该版未收录
+{
+  "attributes": {
+    "method": "brin",
+    "name": "float_bloom_ops"
+  },
+  "classes": [
+    {
+      "default": "f",
+      "family": "float_bloom_ops",
+      "input_type": "float4",
+      "key_type": "float4",
+      "method": "brin",
+      "name": "float4_bloom_ops"
+    },
+    {
+      "default": "f",
+      "family": "float_bloom_ops",
+      "input_type": "float8",
+      "key_type": "float8",
+      "method": "brin",
+      "name": "float8_bloom_ops"
+    }
+  ],
+  "kind": "family",
+  "operators": [
+    {
+      "family": "float_bloom_ops",
+      "left_type": "float4",
+      "method": "brin",
+      "operator": "=(float4,float4)",
+      "purpose": "search",
+      "right_type": "float4",
+      "sort_family": "",
+      "strategy": "1"
+    },
+    {
+      "family": "float_bloom_ops",
+      "left_type": "float8",
+      "method": "brin",
+      "operator": "=(float8,float8)",
+      "purpose": "search",
+      "right_type": "float8",
+      "sort_family": "",
+      "strategy": "1"
+    }
+  ],
+  "support_functions": [
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_opcinfo(internal)",
+      "left_type": "float4",
+      "method": "brin",
+      "number": "1",
+      "result_type": "internal",
+      "right_type": "float4"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_opcinfo(internal)",
+      "left_type": "float8",
+      "method": "brin",
+      "number": "1",
+      "result_type": "internal",
+      "right_type": "float8"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "hashfloat4(float4)",
+      "left_type": "float4",
+      "method": "brin",
+      "number": "11",
+      "result_type": "int4",
+      "right_type": "float4"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "hashfloat8(float8)",
+      "left_type": "float8",
+      "method": "brin",
+      "number": "11",
+      "result_type": "int4",
+      "right_type": "float8"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_add_value(internal,internal,internal,internal)",
+      "left_type": "float4",
+      "method": "brin",
+      "number": "2",
+      "result_type": "bool",
+      "right_type": "float4"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_add_value(internal,internal,internal,internal)",
+      "left_type": "float8",
+      "method": "brin",
+      "number": "2",
+      "result_type": "bool",
+      "right_type": "float8"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_consistent(internal,internal,internal,int4)",
+      "left_type": "float4",
+      "method": "brin",
+      "number": "3",
+      "result_type": "bool",
+      "right_type": "float4"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_consistent(internal,internal,internal,int4)",
+      "left_type": "float8",
+      "method": "brin",
+      "number": "3",
+      "result_type": "bool",
+      "right_type": "float8"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_union(internal,internal,internal)",
+      "left_type": "float4",
+      "method": "brin",
+      "number": "4",
+      "result_type": "bool",
+      "right_type": "float4"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_union(internal,internal,internal)",
+      "left_type": "float8",
+      "method": "brin",
+      "number": "4",
+      "result_type": "bool",
+      "right_type": "float8"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_options(internal)",
+      "left_type": "float4",
+      "method": "brin",
+      "number": "5",
+      "result_type": "void",
+      "right_type": "float4"
+    },
+    {
+      "family": "float_bloom_ops",
+      "function": "brin_bloom_options(internal)",
+      "left_type": "float8",
+      "method": "brin",
+      "number": "5",
+      "result_type": "void",
+      "right_type": "float8"
+    }
+  ]
+}

比较已记录的接口与属性，排除来源指纹和构建元数据。某个样本中没有记录，不能据此判断实际引入或移除的版本。

相关条目

• brin/bit_minmax_ops (family)
• brin/box_inclusion_ops (family)
• brin/bpchar_bloom_ops (family)
• brin/bpchar_minmax_ops (family)
• brin/bytea_bloom_ops (family)
• brin/bytea_minmax_ops (family)
• brin/char_bloom_ops (family)
• brin/char_minmax_ops (family)
• brin/datetime_bloom_ops (family)
• brin/datetime_minmax_multi_ops (family)
• brin/datetime_minmax_ops (family)
• brin/float_minmax_multi_ops (family)