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  5. PG_COLLATION

PG_COLLATION

PG_COLLATION describes 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

-

Column identifier (hidden attribute; must be explicitly selected)

collname

name

-

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

-

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

collcollate

name

-

LC_COLLATE for this collation object

collctype

name

-

LC_CTYPE for this collation object