asterix-app/src/test/resources/optimizerts/queries/inverted-index-join/ngram-contains.aql

/*
 * Description    : Tests whether an ngram_index is applied to optimize a join query using the contains function.
 *                  The index should be applied.
 * 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 dataset DBLP(DBLPType) primary key id;

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

write output to nc1:"rttest/inverted-index-join_ngram-contains.adm";

for $o1 in dataset('DBLP')
for $o2 in dataset('DBLP')
where contains($o1.title, $o2.title) and $o1.id < $o2.id
order by $o1.id, $o2.id
return {"title1":$o1.title, "title2":$o2.title}