blob: 66ef43b27e9769aae00a488cb850eaea1e929bd4 [file] [log] [blame]
/*
* Description : Tests whether an ngram_index is applied to optimize a selection query using the contains function.
* 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) partitioned by key id;
load dataset DBLP
using "edu.uci.ics.asterix.external.dataset.adapter.NCFileSystemAdapter"
(("path"="nc1://data/dblp-small/dblp-small-id.txt"),("format"="delimited-text"),("delimiter"=":")) pre-sorted;
create index ngram_index on DBLP(title) type ngram(3);
write output to nc1:"rttest/inverted-index-basic_ngram-contains-panic.adm";
// Cannot optimize this query because the string constant is shorter than the gram length.
for $o in dataset('DBLP')
where contains($o.title, "Mu")
order by $o.id
return $o