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51.22. pg_extension

The catalog pg_extension stores information about the installed extensions. See Section 37.15 for details about extensions.

Table 51.22. pg_extension Columns

Name Type References Description

oid

oid

Row identifier (hidden attribute; must be explicitly selected)

extname

name

Name of the extension

extowner

oid

pg_authid.oid

Owner of the extension

extnamespace

oid

pg_namespace.oid

Schema containing the extension’s exported objects

extrelocatable

bool

True if extension can be relocated to another schema

extversion

text

Version name for the extension

extconfig

oid[]

pg_class.oid

Array of regclass OIDs for the extension’s configuration table(s), or NULL if none

extcondition

text[]

Array of WHERE-clause filter conditions for the extension’s configuration table(s), or NULL if none

+

Note that unlike most catalogs with a “[.quote]#namespace”# column, extnamespace is not meant to imply that the extension belongs to that schema. Extension names are never schema-qualified. Rather, extnamespace indicates the schema that contains most or all of the extension’s objects. If extrelocatable is true, then this schema must in fact contain all schema-qualifiable objects belonging to the extension.


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