The pg_amproc table stores information about support procedures associated with index access method operator classes. There is one row for each support procedure belonging to an operator class.

column type references description
oid oid   Row identifier (hidden attribute; must be explicitly selected)
amprocfamily oid pg_opfamily.oid The operator family this entry is for
amproclefttype oid pg_type.oid Left-hand input data type of associated operator
amprocrighttype oid pg_type.oid Right-hand input data type of associated operator
amprocnum smallint   Support procedure number
amproc regproc pg_proc.oid OID of the procedure

Parent topic: System Catalogs Definitions

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