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https://issues.apache.org/jira/browse/DRILL-6519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16525881#comment-16525881
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ASF GitHub Bot commented on DRILL-6519:
---------------------------------------
cgivre commented on a change in pull request #1331: DRILL-6519: Add String
Distance and Phonetic Functions
URL: https://github.com/apache/drill/pull/1331#discussion_r198701570
##########
File path:
exec/java-exec/src/test/java/org/apache/drill/exec/fn/impl/TestStringDistanceFunctions.java
##########
@@ -0,0 +1,80 @@
+/*
+ * 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.
+ */
+
+package org.apache.drill.exec.fn.impl;
+
+import org.apache.drill.categories.SqlFunctionTest;
+import org.apache.drill.categories.UnlikelyTest;
+import org.apache.drill.test.ClusterFixture;
+import org.apache.drill.test.ClusterFixtureBuilder;
+import org.apache.drill.test.ClusterTest;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.experimental.categories.Category;
+
+import static org.junit.Assert.assertEquals;
+
+@Category({UnlikelyTest.class, SqlFunctionTest.class})
+public class TestStringDistanceFunctions extends ClusterTest {
+
+ @BeforeClass
+ public static void setup() throws Exception {
Review comment:
@arina-ielchiieva I added a singletonDouble() function and reworked the unit
tests accordingly.
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> Add String Distance and Phonetic Functions
> ------------------------------------------
>
> Key: DRILL-6519
> URL: https://issues.apache.org/jira/browse/DRILL-6519
> Project: Apache Drill
> Issue Type: Improvement
> Reporter: Charles Givre
> Assignee: Charles Givre
> Priority: Major
> Labels: doc-impacting
> Fix For: 1.14.0
>
>
> From a recent project, this collection of functions makes it possible to do
> fuzzy string matching as well as phonetic matching on strings.
>
> The following functions are all phonetic functions and map text to a number
> or string based on how the word sounds. For instance "Jayme" and "Jaime"
> have the same soundex values and hence these functions can be used to match
> similar sounding words.
> * caverphone1( <string> )
> * caverphone2( <string> )
> * cologne_phonetic( <string> )
> * dm_soundex( <string> )
> * double_metaphone(<string>)
> * match_rating_encoder( <string> )
> * metaphone(<string>)
> * nysiis( <string> )
> * refined_soundex(<string>)
> * soundex(<string>)
> Additionally, there is the
> {code:java}
> sounds_like(<string1>,<string2>){code}
> function which can be used to find strings that sound similar. For instance:
>
> {code:java}
> SELECT *
> FROM <data>
> WHERE sounds_like( last_name, 'Gretsky' )
> {code}
> h2. String Distance Functions
> In addition to the phonetic functions, there are a series of distance
> functions which measure the difference between two strings. The functions
> include:
> * cosine_distance(<string1>,<string2>)
> * fuzzy_score(<string1>,<string2>)
> * hamming_distance (<string1>,<string2>)
> * jaccard_distance (<string1>,<string2>)
> * jaro_distance (<string1>,<string2>)
> * levenshtein_distance (<string1>,<string2>)
> * longest_common_substring_distance(<string1>,<string2>)
>
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