/*
 * Description    : Fuzzy self joins a dataset, DBLP, based on ~= using Jaccard of its titles' word tokens.
 *                  DBLP has a keyword index on title, and we expect the join to be transformed into an indexed nested-loop join.
 * 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) partitioned by key id;

create index keyword_index on DBLP(title) type keyword;

write output to nc1:"rttest/inverted-index-join_word-fuzzyeq-jaccard_03.adm";

set simfunction 'jaccard';
set simthreshold '0.5f';

for $a in dataset('DBLP')
for $b in dataset('DBLP')
where word-tokens($a.title) ~= word-tokens($b.title) and $a.id < $b.id
return {"arec": $a, "brec": $b }