btree/varchar_ops (class)
B-tree operator class for text; member of text_ops.
当前阅读 PG 18·选择有来源记录的版本
此版本暂无所选语言的定义，以下显示原始英文内容。
- 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_ops, btree/varchar_ops
- signature
- btree/varchar_ops
- source oid
- 未知
版本定义 PG 18
B-tree operator class for text; member of text_ops.
Family operator strategies
| Operator overload | Strategy | Purpose | Ordering family | 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 | |
| <(name,name) | 1 | search | Family member | less than | |
| <=(name,name) | 2 | search | Family member | less than or equal | |
| =(name,name) | 3 | search | Family member | equal | |
| >=(name,name) | 4 | search | Family member | greater than or equal | |
| >(name,name) | 5 | search | Family member | greater than | |
| <(name,text) | 1 | search | Family member | less than | |
| <=(name,text) | 2 | search | Family member | less than or equal | |
| =(name,text) | 3 | search | Family member | equal | |
| >=(name,text) | 4 | search | Family member | greater than or equal | |
| >(name,text) | 5 | search | Family member | greater than | |
| <(text,name) | 1 | search | Family member | less than | |
| <=(text,name) | 2 | search | Family member | less than or equal | |
| =(text,name) | 3 | search | Family member | equal | |
| >=(text,name) | 4 | search | Family member | greater than or equal | |
| >(text,name) | 5 | search | Family member | greater than |
Family support functions
| Support number | Left type | Right type | Function signature | Result type |
|---|---|---|---|---|
| 1 | text | text | bttextcmp(text,text) | int4 |
| 2 | text | text | bttextsortsupport(internal) | void |
| 4 | text | text | btvarstrequalimage(oid) | bool |
| 1 | name | name | btnamecmp(name,name) | int4 |
| 2 | name | name | btnamesortsupport(internal) | void |
| 4 | name | name | btvarstrequalimage(oid) | bool |
| 1 | name | text | btnametextcmp(name,text) | int4 |
| 1 | text | name | bttextnamecmp(text,name) | int4 |
Classes in this family
比较版本
完整来源事实
class
{"default":"f","family":"text_ops","input_type":"text","key_type":"none","method":"btree","name":"varchar_ops"}classes
map[default:t family:text_ops family_slug:family-btree-text_ops input_type:name key_type:cstring method:btree name:name_ops slug:class-btree-name_ops source_oid:], map[default:t family:text_ops family_slug:family-btree-text_ops input_type:text key_type:none method:btree name:text_ops slug:class-btree-text_ops source_oid:3126], map[default:f family:text_ops family_slug:family-btree-text_ops input_type:text key_type:none method:btree name:varchar_ops slug:class-btree-varchar_ops source_oid:]
operators
map[description:less than family:text_ops family_slug:family-btree-text_ops left_type:text method:btree operator:<(text,text) operator_slug:op-3c-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_ops family_slug:family-btree-text_ops left_type:text method:btree operator:<=(text,text) operator_slug:op-3c3d-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:2], map[description:equal family:text_ops family_slug:family-btree-text_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_ops family_slug:family-btree-text_ops left_type:text method:btree operator:>=(text,text) operator_slug:op-3e3d-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:4], map[description:greater than family:text_ops family_slug:family-btree-text_ops left_type:text method:btree operator:>(text,text) operator_slug:op-3e-text-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:5], map[description:less than family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:<(name,name) operator_slug:op-3c-name-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:1], map[description:less than or equal family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:<=(name,name) operator_slug:op-3c3d-name-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:2], map[description:equal family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:=(name,name) operator_slug:op-3d-name-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:3], map[description:greater than or equal family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:>=(name,name) operator_slug:op-3e3d-name-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:4], map[description:greater than family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:>(name,name) operator_slug:op-3e-name-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:5], map[description:less than family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:<(name,text) operator_slug:op-3c-name-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:1], map[description:less than or equal family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:<=(name,text) operator_slug:op-3c3d-name-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:2], map[description:equal family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:=(name,text) operator_slug:op-3d-name-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:3], map[description:greater than or equal family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:>=(name,text) operator_slug:op-3e3d-name-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:4], map[description:greater than family:text_ops family_slug:family-btree-text_ops left_type:name method:btree operator:>(name,text) operator_slug:op-3e-name-text purpose:search result_type:bool right_type:text sort_family: sort_family_slug: strategy:5], map[description:less than family:text_ops family_slug:family-btree-text_ops left_type:text method:btree operator:<(text,name) operator_slug:op-3c-text-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:1], map[description:less than or equal family:text_ops family_slug:family-btree-text_ops left_type:text method:btree operator:<=(text,name) operator_slug:op-3c3d-text-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:2], map[description:equal family:text_ops family_slug:family-btree-text_ops left_type:text method:btree operator:=(text,name) operator_slug:op-3d-text-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:3], map[description:greater than or equal family:text_ops family_slug:family-btree-text_ops left_type:text method:btree operator:>=(text,name) operator_slug:op-3e3d-text-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:4], map[description:greater than family:text_ops family_slug:family-btree-text_ops left_type:text method:btree operator:>(text,name) operator_slug:op-3e-text-name purpose:search result_type:bool right_type:name sort_family: sort_family_slug: strategy:5]
support functions
map[family:text_ops family_slug:family-btree-text_ops function:bttextcmp(text,text) left_type:text method:btree number:1 result_type:int4 right_type:text], map[family:text_ops family_slug:family-btree-text_ops function:bttextsortsupport(internal) left_type:text method:btree number:2 result_type:void right_type:text], map[family:text_ops family_slug:family-btree-text_ops function:btvarstrequalimage(oid) left_type:text method:btree number:4 result_type:bool right_type:text], map[family:text_ops family_slug:family-btree-text_ops function:btnamecmp(name,name) left_type:name method:btree number:1 result_type:int4 right_type:name], map[family:text_ops family_slug:family-btree-text_ops function:btnamesortsupport(internal) left_type:name method:btree number:2 result_type:void right_type:name], map[family:text_ops family_slug:family-btree-text_ops function:btvarstrequalimage(oid) left_type:name method:btree number:4 result_type:bool right_type:name], map[family:text_ops family_slug:family-btree-text_ops function:btnametextcmp(name,text) left_type:name method:btree number:1 result_type:int4 right_type:text], map[family:text_ops family_slug:family-btree-text_ops function:bttextnamecmp(text,name) left_type:text method:btree number:1 result_type:int4 right_type:name]
来源引用
- Matching PostgreSQL source archive
- PostgreSQL 18 English manual: indexes-opclass.html
- PostgreSQL 18 English manual: catalog-pg-opclass.html
- PostgreSQL 18 English manual: catalog-pg-amop.html
- PostgreSQL 18 English manual: catalog-pg-amproc.html
- 固定 PostgreSQL 源码归档
定义来源
center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f
正文语言: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f