pg_amproc

The pg_amproc table stores information about support procedures associated with index access method operator classes. There is one row for each support procedure belonging to an operator class.

column	type	references	description
amopclaid	oid	pg_opclass.oid	The index operator class this entry is for
amprocsubtype	oid	pg_type.oid	Subtype, if cross-type routine, else zero
amprocnum	int2		Support procedure number
amproc	regproc	pg_proc.oid	OID of the procedure

Parent topic: System Catalogs Definitions