btree/char_ops (class)

B-tree operator class for char; member of char_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: char
Stored key type: Same as input type (catalog zero)
Default class: yes
aliases: char_ops, btree/char_ops
classes: map[default:t family:char_ops family_slug:family-btree-char_ops input_type:char key_type:none method:btree name:char_ops slug:class-btree-char_ops source_oid:]
signature: btree/char_ops
source oid: 未知

版本定义 PG 18

B-tree operator class for char; member of char_ops.

Family operator strategies

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

Family support functions

Support number	Left type	Right type	Function signature	Result type
1	char	char	btcharcmp(char,char)	int4
4	char	char	btequalimage(oid)	bool
6	char	char	btcharskipsupport(internal)	void

Classes in this family

Class	Input type	Key type	Default
char_ops	char	Same as input type	yes

比较版本

完整来源事实

class

{"default":"t","family":"char_ops","input_type":"char","key_type":"none","method":"btree","name":"char_ops"}

operators

map[description:less than family:char_ops family_slug:family-btree-char_ops left_type:char method:btree operator:<(char,char) operator_slug:op-3c-char-char purpose:search result_type:bool right_type:char sort_family: sort_family_slug: strategy:1], map[description:less than or equal family:char_ops family_slug:family-btree-char_ops left_type:char method:btree operator:<=(char,char) operator_slug:op-3c3d-char-char purpose:search result_type:bool right_type:char sort_family: sort_family_slug: strategy:2], map[description:equal family:char_ops family_slug:family-btree-char_ops left_type:char method:btree operator:=(char,char) operator_slug:op-3d-char-char purpose:search result_type:bool right_type:char sort_family: sort_family_slug: strategy:3], map[description:greater than or equal family:char_ops family_slug:family-btree-char_ops left_type:char method:btree operator:>=(char,char) operator_slug:op-3e3d-char-char purpose:search result_type:bool right_type:char sort_family: sort_family_slug: strategy:4], map[description:greater than family:char_ops family_slug:family-btree-char_ops left_type:char method:btree operator:>(char,char) operator_slug:op-3e-char-char purpose:search result_type:bool right_type:char sort_family: sort_family_slug: strategy:5]

support functions

map[family:char_ops family_slug:family-btree-char_ops function:btcharcmp(char,char) left_type:char method:btree number:1 result_type:int4 right_type:char], map[family:char_ops family_slug:family-btree-char_ops function:btequalimage(oid) left_type:char method:btree number:4 result_type:bool right_type:char], map[family:char_ops family_slug:family-btree-char_ops function:btcharskipsupport(internal) left_type:char method:btree number:6 result_type:void right_type:char]

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