52.22. pg_extension

52.22. `pg_extension`
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The catalog pg_extension stores information about the installed extensions. See Section 38.16 for details about extensions.

Table 52.22. 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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