asterix-app/src/test/resources/demo_aql/rainbow/110-self-join-dblp.aql

/*
 * 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.
 */
use dataverse demo_aql;

declare type DBLPType as open {
 id: int32,
 dblpid: string,
 title: string,
 authors: string,
 misc: string
}

declare nodegroup group1 on rainbow-01, rainbow-02, rainbow-03, rainbow-04, rainbow-05;

declare dataset DBLP(DBLPType) 
  primary key id on group1;

write output to rainbow-01:"/home/onose/hyracks-rainbow/results/110-self-join-dblp.adm";

set simthreshold '.8f';

for $k in (
  for $i in dataset('DBLP')
  for $j in dataset('DBLP')
  where $i.title ~= $j.title
  order by $i.id, $j.id
  return {'dblp1': $i, 'dblp2': $j}
) 
where $k.dblp1.id < $k.dblp2.id
return $k