hash/int2_ops (class)

Hash operator class for int2; member of integer_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: Hash
Input type: int2
Stored key type: Same as input type (catalog zero)
Default class: yes
aliases: int2_ops, hash/int2_ops
signature: hash/int2_ops
source oid: 未知

版本定义 PG 18

Hash operator class for int2; member of integer_ops.

Family operator strategies

Operator overload	Strategy	Purpose	Membership scope	Source description
=(int2,int2)	1	search	Class input pair	equal
=(int4,int4)	1	search	Family member	equal
=(int8,int8)	1	search	Family member	equal
=(int2,int4)	1	search	Family member	equal
=(int2,int8)	1	search	Family member	equal
=(int4,int2)	1	search	Family member	equal
=(int4,int8)	1	search	Family member	equal
=(int8,int2)	1	search	Family member	equal
=(int8,int4)	1	search	Family member	equal

Family support functions

Support number	Left type	Right type	Function signature	Result type
1	int2	int2	hashint2(int2)	int4
2	int2	int2	hashint2extended(int2,int8)	int8
1	int4	int4	hashint4(int4)	int4
2	int4	int4	hashint4extended(int4,int8)	int8
1	int8	int8	hashint8(int8)	int4
2	int8	int8	hashint8extended(int8,int8)	int8

Classes in this family

Class	Input type	Key type	Default
int2_ops	int2	Same as input type	yes
int4_ops	int4	Same as input type	yes
int8_ops	int8	Same as input type	yes

比较版本

完整来源事实

class

{"default":"t","family":"integer_ops","input_type":"int2","key_type":"none","method":"hash","name":"int2_ops"}

classes

map[default:t family:integer_ops family_slug:family-hash-integer_ops input_type:int2 key_type:none method:hash name:int2_ops slug:class-hash-int2_ops source_oid:], map[default:t family:integer_ops family_slug:family-hash-integer_ops input_type:int4 key_type:none method:hash name:int4_ops slug:class-hash-int4_ops source_oid:], map[default:t family:integer_ops family_slug:family-hash-integer_ops input_type:int8 key_type:none method:hash name:int8_ops slug:class-hash-int8_ops source_oid:]

operators

map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int2 method:hash operator:=(int2,int2) operator_slug:op-3d-int2-int2 purpose:search result_type:bool right_type:int2 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int4 method:hash operator:=(int4,int4) operator_slug:op-3d-int4-int4 purpose:search result_type:bool right_type:int4 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int8 method:hash operator:=(int8,int8) operator_slug:op-3d-int8-int8 purpose:search result_type:bool right_type:int8 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int2 method:hash operator:=(int2,int4) operator_slug:op-3d-int2-int4 purpose:search result_type:bool right_type:int4 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int2 method:hash operator:=(int2,int8) operator_slug:op-3d-int2-int8 purpose:search result_type:bool right_type:int8 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int4 method:hash operator:=(int4,int2) operator_slug:op-3d-int4-int2 purpose:search result_type:bool right_type:int2 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int4 method:hash operator:=(int4,int8) operator_slug:op-3d-int4-int8 purpose:search result_type:bool right_type:int8 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int8 method:hash operator:=(int8,int2) operator_slug:op-3d-int8-int2 purpose:search result_type:bool right_type:int2 sort_family: sort_family_slug: strategy:1], map[description:equal family:integer_ops family_slug:family-hash-integer_ops left_type:int8 method:hash operator:=(int8,int4) operator_slug:op-3d-int8-int4 purpose:search result_type:bool right_type:int4 sort_family: sort_family_slug: strategy:1]

support functions

map[family:integer_ops family_slug:family-hash-integer_ops function:hashint2(int2) left_type:int2 method:hash number:1 result_type:int4 right_type:int2], map[family:integer_ops family_slug:family-hash-integer_ops function:hashint2extended(int2,int8) left_type:int2 method:hash number:2 result_type:int8 right_type:int2], map[family:integer_ops family_slug:family-hash-integer_ops function:hashint4(int4) left_type:int4 method:hash number:1 result_type:int4 right_type:int4], map[family:integer_ops family_slug:family-hash-integer_ops function:hashint4extended(int4,int8) left_type:int4 method:hash number:2 result_type:int8 right_type:int4], map[family:integer_ops family_slug:family-hash-integer_ops function:hashint8(int8) left_type:int8 method:hash number:1 result_type:int4 right_type:int8], map[family:integer_ops family_slug:family-hash-integer_ops function:hashint8extended(int8,int8) left_type:int8 method:hash number:2 result_type:int8 right_type:int8]

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