blob: bf6bb82da987bd0738d2164795015faa7a5c68d2 [file] [log] [blame]
/*
* Description : Fuzzy self joins a dataset, DBLP, based on the similarity-jaccard function of its titles' 3-gram tokens.
* DBLP has a 3-gram index on title, and we expect the join to be transformed into an indexed nested-loop join.
* We test the inlining of variables that enable the select to be pushed into the join for subsequent optimization with an index.
* 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 dataset DBLP(DBLPType) primary key id;
create index ngram_index on DBLP(title) type ngram(3);
write output to nc1:"rttest/inverted-index-join-noeqjoin_ngram-jaccard-inline.adm";
for $a in dataset('DBLP')
for $b in dataset('DBLP')
let $jacc := similarity-jaccard(gram-tokens($a.title, 3, false), gram-tokens($b.title, 3, false))
where $jacc >= 0.5f and $a.id < $b.id
return {"atitle": $a.title, "btitle": $b.title, "jacc": $jacc}