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tz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e4\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e搜索\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e\u0026gt;=(timestamptz,timestamptz)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e5\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e搜索\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e\u0026gt;(timestamptz,timestamptz)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003e\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003ch3\u003e支持函数\u003c/h3\u003e\u003ctable\u003e\u003cthead\u003e\u003ctr\u003e\u003cth\u003e支持函数编号\u003c/th\u003e\u003cth\u003e实现函数\u003c/th\u003e\u003cth\u003e左操作数类型\u003c/th\u003e\u003cth\u003e右操作数类型\u003c/th\u003e\u003cth\u003e结果类型\u003c/th\u003e\u003c/tr\u003e\u003c/thead\u003e\u003ctbody\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e1\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_opcinfo(internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003einternal\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e2\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_add_value(internal,internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e3\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_consistent(internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e4\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_union(internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamp\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e1\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_opcinfo(internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003einternal\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e2\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_add_value(internal,internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e3\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_consistent(internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e4\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_union(internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003etimestamptz\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e1\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_opcinfo(internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003einternal\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e2\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_add_value(internal,internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e3\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_consistent(internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003ctr\u003e\u003ctd\u003e\u003ccode\u003e4\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebrin_minmax_union(internal,internal,internal)\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003edate\u003c/code\u003e\u003c/td\u003e\u003ctd\u003e\u003ccode\u003ebool\u003c/code\u003e\u003c/td\u003e\u003c/tr\u003e\u003c/tbody\u003e\u003c/table\u003e\u003ch3\u003e同版本中文手册节选\u003c/h3\u003e\u003cp\u003e\n   一个索引定义可以为索引的每一列指定一个\u003cem class=\"firstterm\"\u003e操作符类\u003c/em\u003e。\n\u003c/p\u003e\u003cp\u003e\n   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 \u003ccode class=\"type\"\u003eint4\u003c/code\u003e 上的一个 B-树索引会使用 \u003ccode class=\"literal\"\u003eint4_ops\u003c/code\u003e 类；这个操作符类包含对 \u003ccode class=\"type\"\u003eint4\u003c/code\u003e 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 \u003ccode class=\"literal\"\u003eCOLLATE\u003c/code\u003e、\u003ccode class=\"literal\"\u003eASC\u003c/code\u003e/\u003ccode class=\"literal\"\u003eDESC\u003c/code\u003e 和/或 \u003ccode class=\"literal\"\u003eNULLS FIRST\u003c/code\u003e/\u003ccode class=\"literal\"\u003eNULLS LAST\u003c/code\u003e 来修改）。\n  \u003c/p\u003e\u003cp\u003e\n   除了默认操作符类之外，还有一些内置操作符类：\n\n   \u003c/p\u003e\u003cp\u003e\n    下面的查询会显示所有已定义的操作符类：\n\n\u003c/p\u003e\u003cp\u003e\u003ca href=\"/zh/docs/18/indexes-opclass.html\"\u003e查看完整中文手册与上下文\u003c/a\u003e。\u003c/p\u003e","facts":[{"label":"Object kind","value":"Operator class"},{"label":"Index AM","value":"BRIN"},{"label":"Input type","value":"date"},{"label":"Stored key type","value":"date"},{"label":"Default class","value":"yes"}],"facts_zh":[{"label":"对象种类","value":"操作符类"},{"label":"索引访问方法","value":"BRIN"},{"label":"输入类型","value":"date"},{"label":"存储键类型","value":"date"},{"label":"默认操作符类","value":"是"}],"operators":[{"description":"less than","family":"datetime_minmax_ops","family_slug":"family-brin-datetime_minmax_ops","left_type":"timestamp","method":"brin","operator":"\u003c(timestamp,timestamp)","operator_slug":"op-3c-timestamp-timestamp","purpose":"search","result_type":"bool","right_type":"timestamp","sort_family":"","sort_family_slug":"","strategy":"1"},{"description":"less than or 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