basetype_multirangetype basetype_rangetype ensure_range_basetype oid_oper oid_type oper_oid range_basetype type_oid

oid_type() meosType oid_type ( Oid  typid ) Fetch from the cache the type number. [in] type Type Oid Note This function cannot send an error when the type is not found since it is used for all types that appear in the pg_operator table when the extension is created