| /* |
| * 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. |
| * 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-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 |
| return $o |