| * 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). |
| drop dataverse test if exists; |
| create type DBLPType as closed { |
| create dataset DBLP(DBLPType) primary key id; |
| 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") |