asterix-app/src/test/resources/optimizerts/queries/inverted-index-complex/ngram-edit-distance-check-substring.aql

/*
 * Description    : Tests whether an ngram_index index is applied to optimize a selection query using the similarity-edit-distance-check function on the substring of the field.
 *                  Tests that the optimizer rule correctly drills through the substring 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-complex_ngram-edit-distance-check-substring.adm";

for $paper in dataset('DBLP')
where edit-distance-check(substring($paper.title, 0, 8), "datbase", 1)[0]
return {
  "id" : $paper.id,
  "title" : $paper.title
}