| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| /* |
| * Description : Fuzzy joins two datasets, DBLP and CSX, based on the edit-distance-check function of their authors. |
| * DBLP has a 3-gram enforced open index on authors, and we *do not* expect the join to be transformed |
| * into an indexed nested-loop join, because CSX does not declare an enforced open index on field authors. |
| * Success : Yes |
| */ |
| |
| drop dataverse test if exists; |
| create dataverse test; |
| |
| use test; |
| |
| |
| create type test.DBLPType as |
| { |
| id : int32, |
| dblpid : string, |
| title : string, |
| misc : string |
| } |
| |
| create type test.CSXType as |
| { |
| id : int32, |
| csxid : string, |
| title : string, |
| misc : string |
| } |
| |
| create dataset DBLP(DBLPType) primary key id; |
| |
| create dataset CSX(CSXType) primary key id; |
| |
| create index ngram_index on DBLP (authors:string) type ngram (3) enforced; |
| |
| write output to asterix_nc1:"rttest/inverted-index-join_ngram-edit-distance-check_01.adm" |
| select element {'arec':a,'brec':b} |
| from DBLP as a, |
| CSX as b |
| where (test.`edit-distance-check`(a.authors,b.authors,3)[0] and (a.id < b.id)) |
| ; |