CREATE OPERATOR

Sintáxis:

        CREATE OPERATOR operator_name (
        [LEFTARG = type1][,RIGHTARG = type2]
        ,PROCEDURE = func_name,
        [,COMMUTATOR = com_op][,NEGATOR = neg_op]
        [,RESTRICT = res_proc][,JOIN = join_proc][,HASHES]
        [,SORT1 = left_sort_op][,SORT2 = right_sort_op]);