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Updated on 2025-06-12 GMT+08:00
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PG_COLLATION

PG_COLLATION records the available collations, which are essentially mappings from an SQL name to operating system locale categories.

Table 1 PG_COLLATION columns

Name

Type

Reference

Description

OID

OID

N/A

Row identifier (hidden attribute; displayed only when explicitly selected)

collname

Name

N/A

Collation name (unique per namespace and encoding)

collnamespace

OID

PG_NAMESPACE.oid

OID of the namespace that contains this collation

collowner

OID

PG_AUTHID.oid

Owner of the collation

collencoding

Integer

N/A

Encoding in which the collation is applicable, or -1 if it works for any encoding

collcollate

Name

N/A

LC_COLLATE for this collation object

collctype

Name

N/A

LC_CTYPE for this collation object
Parent Topic: System Catalogs