Gbase 8C system table PG_ amproc

pg_amproc The system table stores information about the supporting procedures associated with the access method operator family . Each supporting procedure belonging to a certain operator family occupies a line .

name	type	quote	describe
oid	oid		Row identifier （ Hidden attribute , Must be explicitly selected to display ）
amprocfamily	oid	pg_opfamily.oid	Operator family using this item
amproclefttype	oid	pg_type.oid	Left hand input data type of related operators
amprocrighttype	oid	pg_type.oid	The right hand input data type of the relevant operator
amprocnum	int2		Support process number
amproc	regproc	pg_proc.oid	Process of OID

amproclefttype and amprocrighttype Customary interpretation of fields , Identify the left and right input types of operators supported by a specific support procedure . For some access methods , Match the input data types that support the process itself , Not for others . There is an index “ default ” Support the concept of process ,amproclefttype and amprocrighttype Are equal to the index operator class opcintype.