51.35. pg_opfamily#
The catalogpg_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.
Operator families are described at length inSection 36.16.
Table 51.35. pg_opfamily Columns
Column Type Description |
|---|
Row identifier |
Index access method operator family is for |
Name of this operator family |
Namespace of this operator family |
Owner of the operator family |
The majority of the information defining an operator family is not in itspg_opfamily row, but in the associated rows inpg_amop,pg_amproc, andpg_opclass.