| * Description : Tests whether an ngram_index is applied to optimize a selection query using the similarity-jaccard function on 3-gram tokens. |
| * The index should be applied. |
| drop dataverse test if exists; |
| set import-private-functions 'true'; |
| 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-jaccard.adm"; |
| for $o in dataset('DBLP') |
| where similarity-jaccard(gram-tokens($o.title, 3, false), gram-tokens("Transactions for Cooperative Environments", 3, false)) >= 0.5f |