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	PG_NAMESPACE.oid	OID of the namespace that contains the operator
oprowner	oid	PG_AUTHID.oid	Owner of the operator
oprkind	"char"	-	- b: infix ("both") - l: prefix ("left") - r: postfix ("right")
oprcanmerge	Boolean	-	Whether the operator supports merge joins
oprcanhash	Boolean	-	Whether the operator supports hash joins
oprleft	oid	PG_TYPE.oid	Type of the left operand
oprright	oid	PG_TYPE.oid	Type of the right operand
oprresult	oid	PG_TYPE.oid	Type of the result
oprcom	oid	PG_OPERATOR.oid	Commutator of this operator, if any
oprnegate	oid	PG_OPERATOR.oid	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