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

/*
 * Description    : Tests whether an ngram_index is applied to optimize a selection query using the edit-distance-check function on strings.
 *                  Tests that the optimizer rule correctly drills through the let clauses.
 *                  The index should *not* be applied (see below).
 * 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(authors) type ngram(3);

write output to nc1:"rttest/inverted-index-complex_ngram-edit-distance-check-let-panic.adm";

// This query cannot be optimized with an index, based on the high edit distance.
for $o in dataset('DBLP')
let $ed := edit-distance-check($o.authors, "Amihay Motro", 5)
where $ed[0]
return $o