pg_am

The pg_am table stores information about index access methods. There is one row for each index access method supported by the system.

column	type	references	description
oid	oid		Row identifier (hidden attribute; must be explicitly selected)
amname	name		Name of the access method
amhandler	regproc		OID of a handler function responsible for supplying information about the access method
amtype	char		t for table (including materialized views), i for index

Parent topic: System Catalogs Definitions