asterix-app/src/test/resources/optimizerts/queries/inverted-index-join-noeqjoin/ngram-edit-distance.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
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 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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 */
/*
 * Description    : Fuzzy joins two datasets, DBLP and CSX, based on the edit-distance function of their authors.
 *                  DBLP has a 3-gram index on authors, and we expect the join to be transformed into an indexed nested-loop join.
 *                  We expect the top-level equi join introduced because of surrogate optimization to be removed, since it is not necessary.
 * Success        : Yes
 */

drop dataverse test if exists;
create dataverse test;
use dataverse test;

create type DBLPType as closed {
  id: int32,
  dblpid: string,
  title: string,
  authors: string,
  misc: string
}

create type CSXType as closed {
  id: int32,
  csxid: string,
  title: string,
  authors: string,
  misc: string
}

create dataset DBLP(DBLPType) primary key id;

create dataset CSX(CSXType) primary key id;

create index ngram_index on DBLP(authors) type ngram(3);

write output to asterix_nc1:"rttest/inverted-index-join-noeqjoin_ngram-edit-distance.adm";

for $b in dataset('CSX')
for $a in dataset('DBLP')
where edit-distance($a.authors, $b.authors) < 3 and $a.id < $b.id
return {"aauthors": $a.authors, "bauthors": $b.authors}