--
-- Licensed to the Apache Software Foundation (ASF) under one
-- or more contributor license agreements.  See the NOTICE file
-- distributed with this work for additional information
-- regarding copyright ownership.  The ASF licenses this file
-- to you under the Apache License, Version 2.0 (the
-- "License"); you may not use this file except in compliance
-- with the License.  You may obtain a copy of the License at
--
--     http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Cleanup info about old MR jobs. Keep &1 latest MR job info's
-- &1 - how many latest MR job infos to keep

DELETE FROM workflow
WHERE workflowid IN (
  SELECT workflowid
  FROM (
    SELECT workflowid, row_number() OVER (ORDER BY lastupdatetime  ) AS rnum, count(1) OVER() AS tnum
    FROM workflow
  )
  WHERE rnum <= tnum - &1
);

COMMIT;
