pg_amop

The pg_amop table stores information about operators associated with index access method operator classes. There is one row for each operator that is a member of an operator class.

Table 1. pg_catalog.pg_amop

column	type	references	description
amopclaid	oid	pg_opclass.oid	The index operator class this entry is for
amopsubtype	oid	pg_type.oid	Subtype to distinguish multiple entries for one strategy; zero for default
amopstrategy	smallint		Operator strategy number
amopreqcheck	boolean		Index hit must be rechecked
amopopr	oid	pg_operator.oid	OID of the operator