PG_EXTENSION

PG_EXTENSION records information about the installed extensions. By default, GaussDB(DWS) has 12 extensions, that is, PLPGSQL, DIST_FDW, FILE_FDW, HDFS_FDW, HSTORE, PLDBGAPI, DIMSEARCH, PACKAGES, GC_FDW, UUID-OSSP, LOG_FDW, and ROACH_API.

**Table 1** PG_EXTENSION
Name	Type	Description
extname	name	Extension name
extowner	oid	Owner of the extension
extnamespace	oid	Namespace containing the extension's exported objects
extrelocatable	boolean	Its value is true if the extension can be relocated to another schema.
extversion	text	Version number of the extension
extconfig	oid[]	Configuration information about the extension
extcondition	text[]	Filter conditions for the extension's configuration information