SELECT
   CASE WHEN num <= @row_limit THEN queue_name ELSE 'others' END name,
   num, queue_name, jobs_pend, jobs_run
FROM
  (
  SELECT
    @row_num := @row_num + 1 as num,
    queue_name, jobs_pend, jobs_run
  FROM
    queues, (SELECT @row_num := 0, @row_limit:=5) r
  ) q