PG_OPERATOR

PG_OPERATOR records information about operators.

**Table 1** PG_OPERATOR columns
Name	Type	Reference	Description
oid	oid	-	Row identifier (hidden attribute, which must be specified)
oprname	name	-	Name of an operator
oprnamespace	oid	OID in PG_NAMESPACE	OID of the namespace that contains the operator
oprowner	oid	OID in PG_AUTHID	Owner of the operator
oprkind	"char"	-	b: infix ("both") l: prefix ("left") r: postfix ("right")
oprcanmerge	boolean	-	Whether the operator supports merge joins t (true): yes f (false): no
oprcanhash	boolean	-	Whether the operator supports hash joins t (true): yes f (false): no
oprleft	oid	OID in PG_TYPE	Type of the left operand
oprright	oid	OID in PG_TYPE	Type of the right operand
oprresult	oid	OID in PG_TYPE	Type of the result
oprcom	oid	OID in PG_OPERATOR	Commutator of this operator, if any
oprnegate	oid	OID in PG_OPERATOR	Negator of this operator, if any
oprcode	regproc	PG_PROC.proname	Function that implements the operator
oprrest	regproc	PG_PROC.proname	Restriction selectivity estimation function for the operator
oprjoin	regproc	PG_PROC.proname	Join selectivity estimation function for the operator