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48.22. pg_extension

The catalog pg_extension stores information about the installed extensions. See Section 35.15 for details about extensions.

Table 48-22. 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 "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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