PG_OPFAMILY
PG_OPFAMILY defines operator families.
Each operator family is a collection of operators and associated support routines that implement 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 allows cross-data-type operators to be used with indexes and to be reasoned about using knowledge of access method semantics.
Table 1 PG_OPFAMILY columns
PG_AM.oid | |||
PG_NAMESPACE.oid | |||
PG_AUTHID.oid |
The majority of the information defining an operator family is not in its PG_OPFAMILY row, but in the associated rows in PG_AMOP, PG_AMPROC, and PG_OPCLASS.
Feedback