pg_opfamily defines operator families. Each operator family is a collection of operators and associated support routines that implement the semantics specified for a particular index access method. Furthermore, the operators in a family are all compatible in a way that is specified by the access method. The operator family concept allows cross-data-type operators to be used with indexes and to be reasoned about using knowledge of access method semantics.
||oid||Row identifier (hidden attribute; must be explicitly selected)|
||oid||pg_am.oid||Index access method operator for this family|
||name||Name of this operator family|
||oid||pg_namespace.oid||Namespace of this operator family|
||oid||pg_authid.oid||Owner of the operator family|
Parent topic: System Catalogs Definitions