btree/varchar_pattern_ops (class)

B-tree operator class for text; member of text_pattern_ops.

当前阅读 PG 18·选择有来源记录的版本

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Object kind: Operator class
Index AM: B-tree
Input type: text
Stored key type: Same as input type (catalog zero)
Default class: no
aliases: varchar_pattern_ops, btree/varchar_pattern_ops
signature: btree/varchar_pattern_ops
source oid: 4218

版本定义 PG 18

B-tree operator class for text; member of text_pattern_ops.

Family operator strategies

Operator overload	Strategy	Purpose	Membership scope	Source description
~<~(text,text)	1	search	Class input pair	less than
~<=~(text,text)	2	search	Class input pair	less than or equal
=(text,text)	3	search	Class input pair	equal
~>=~(text,text)	4	search	Class input pair	greater than or equal
~>~(text,text)	5	search	Class input pair	greater than

Family support functions

Support number	Left type	Right type	Function signature	Result type
1	text	text	bttext_pattern_cmp(text,text)	int4
2	text	text	bttext_pattern_sortsupport(internal)	void
4	text	text	btequalimage(oid)	bool

Classes in this family

Class	Input type	Key type	Default
text_pattern_ops	text	Same as input type	no
varchar_pattern_ops	text	Same as input type	no

比较版本

完整来源事实

class

{"default":"f","family":"text_pattern_ops","input_type":"text","key_type":"none","method":"btree","name":"varchar_pattern_ops"}

classes

map[default:f family:text_pattern_ops family_slug:family-btree-text_pattern_ops input_type:text key_type:none method:btree name:text_pattern_ops slug:class-btree-text_pattern_ops source_oid:4217], map[default:f family:text_pattern_ops family_slug:family-btree-text_pattern_ops input_type:text key_type:none method:btree name:varchar_pattern_ops slug:class-btree-varchar_pattern_ops source_oid:4218]

operators

map[description:less than family:text_pattern_ops family_slug:family-btree-text_pattern_ops left_type:text method:btree operator:~<~(text,text) operator_slug:op-7e3c7e-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:1], map[description:less than or equal family:text_pattern_ops family_slug:family-btree-text_pattern_ops left_type:text method:btree operator:~<=~(text,text) operator_slug:op-7e3c3d7e-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:2], map[description:equal family:text_pattern_ops family_slug:family-btree-text_pattern_ops left_type:text method:btree operator:=(text,text) operator_slug:op-3d-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:3], map[description:greater than or equal family:text_pattern_ops family_slug:family-btree-text_pattern_ops left_type:text method:btree operator:~>=~(text,text) operator_slug:op-7e3e3d7e-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:4], map[description:greater than family:text_pattern_ops family_slug:family-btree-text_pattern_ops left_type:text method:btree operator:~>~(text,text) operator_slug:op-7e3e7e-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:5]

support functions

map[family:text_pattern_ops family_slug:family-btree-text_pattern_ops function:bttext_pattern_cmp(text,text) left_type:text method:btree number:1 result_type:int4 right_type:text], map[family:text_pattern_ops family_slug:family-btree-text_pattern_ops function:bttext_pattern_sortsupport(internal) left_type:text method:btree number:2 result_type:void right_type:text], map[family:text_pattern_ops family_slug:family-btree-text_pattern_ops function:btequalimage(oid) left_type:text method:btree number:4 result_type:bool right_type:text]

来源引用

完整定义与证据 JSON

定义来源

center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f

正文语言: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f