PG_EXTENSION

PG_EXTENSION records information about the installed extensions. By default, GaussDB provides 18 extensions: PLPGSQL, DIST_FDW, FILE_FDW, LOG_FDW, GC_FDW, DBLINK_FDW, ROACH_API, STREAMING, TSDB, DIMSEARCH, GSREDISTRIBUTE, SECURITY_PLUGIN, GSSTAT_PLUGIN, PKG_DBE_RAW, PKG_DBE_OUTPUT, PKG_DBE_UTILITY, and PKG_DBE_XML. This is a lab feature. Contact Huawei technical support before using it. This system catalog is for internal use only. You are advised not to use it.

DIMSEARCH is no longer supported in the current version due to specification changes. Do not use it.

**Table 1** PG_EXTENSION
Name	Type	Description
oid	oid	Row identifier (hidden attribute, which must be specified).
extname	name	Extension name
extowner	oid	Owner of the extension
extnamespace	oid	Namespace containing the extension's exported objects
extrelocatable	boolean	Whether the extension can be relocated to another namespace. true: yes; false: no.
extversion	text	Version number of the extension
extconfig	oid[]	Configuration information about the extension
extcondition	text[]	Filter conditions for the extension's configuration information