edit-distance-contains function implementation
diff --git a/asterix-app/src/test/resources/optimizerts/queries/inverted-index-join/ngram-edit-distance-contains.aql b/asterix-app/src/test/resources/optimizerts/queries/inverted-index-join/ngram-edit-distance-contains.aql
new file mode 100644
index 0000000..5d61ede
--- /dev/null
+++ b/asterix-app/src/test/resources/optimizerts/queries/inverted-index-join/ngram-edit-distance-contains.aql
@@ -0,0 +1,38 @@
+/*
+ * Description : Fuzzy joins two datasets, DBLP and CSX, based on the edit-distance-contains function of their authors.
+ * DBLP has a 3-gram index on authors, and we expect the join to be transformed into an indexed nested-loop join.
+ * 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 type CSXType as closed {
+ id: int32,
+ csxid: string,
+ title: string,
+ authors: string,
+ misc: string
+}
+
+create dataset DBLP(DBLPType) primary key id;
+
+create dataset CSX(CSXType) primary key id;
+
+create index ngram_index on DBLP(authors) type ngram(3);
+
+write output to nc1:"rttest/inverted-index-join_ngram-edit-distance-contains.adm";
+
+for $a in dataset('DBLP')
+for $b in dataset('CSX')
+where edit-distance-contains($a.authors, $b.authors, 3)[0] and $a.id < $b.id
+return {"arec": $a, "brec": $b }
\ No newline at end of file
diff --git a/asterix-app/src/test/resources/optimizerts/results/inverted-index-join/ngram-edit-distance-contains.plan b/asterix-app/src/test/resources/optimizerts/results/inverted-index-join/ngram-edit-distance-contains.plan
new file mode 100644
index 0000000..56b5df4
--- /dev/null
+++ b/asterix-app/src/test/resources/optimizerts/results/inverted-index-join/ngram-edit-distance-contains.plan
@@ -0,0 +1,55 @@
+-- DISTRIBUTE_RESULT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- STREAM_PROJECT |PARTITIONED|
+ -- ASSIGN |PARTITIONED|
+ -- STREAM_PROJECT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- HYBRID_HASH_JOIN [$$21][$$14] |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- DATASOURCE_SCAN |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- EMPTY_TUPLE_SOURCE |PARTITIONED|
+ -- HASH_PARTITION_EXCHANGE [$$14] |PARTITIONED|
+ -- UNION_ALL |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- STREAM_PROJECT |PARTITIONED|
+ -- STREAM_SELECT |PARTITIONED|
+ -- STREAM_PROJECT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- BTREE_SEARCH |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- STABLE_SORT [$$26(ASC)] |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- LENGTH_PARTITIONED_INVERTED_INDEX_SEARCH |PARTITIONED|
+ -- BROADCAST_EXCHANGE |PARTITIONED|
+ -- STREAM_SELECT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- SPLIT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- STREAM_PROJECT |PARTITIONED|
+ -- ASSIGN |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- DATASOURCE_SCAN |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- EMPTY_TUPLE_SOURCE |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- STREAM_PROJECT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- NESTED_LOOP |PARTITIONED|
+ -- BROADCAST_EXCHANGE |PARTITIONED|
+ -- ASSIGN |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- DATASOURCE_SCAN |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- EMPTY_TUPLE_SOURCE |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- STREAM_SELECT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- SPLIT |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- STREAM_PROJECT |PARTITIONED|
+ -- ASSIGN |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- DATASOURCE_SCAN |PARTITIONED|
+ -- ONE_TO_ONE_EXCHANGE |PARTITIONED|
+ -- EMPTY_TUPLE_SOURCE |PARTITIONED|