瀚高数据库自定义操作符’!~~’

ERROR: 42883: operator does not exist: integer !~~ integer
  Hint: No operator matches the given name and argument type(s). You might need to add explicit type casts.

create TABLE oper_test(first_num int);
insert into oper_test values(234),(446),(467);

select (446 !~~ first_num) newlist from oper_test;

CREATE OR REPLACE FUNCTION hgdb_catalog.intnlike(integer,integer)
  RETURNS boolean AS $$
  select $1::varchar !~~ $2::varchar;
  $$
  LANGUAGE sql strict;
ALTER FUNCTION intnlike(integer, integer)
  OWNER TO highgo;
COMMENT ON FUNCTION intnlike(integer,integer) IS 'implementation of !~~ operator';create operator hgdb_catalog.!~~(
    procedure = hgdb_catalog.intnlike,
    leftarg = integer,
    rightarg = integer
);