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https://issues.apache.org/jira/browse/HIVE-9557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14600195#comment-14600195
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Alexander Pivovarov commented on HIVE-9557:
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rename clientnegative/udf_cosine_similarity.q to
clientnegative/udf_cosine_similarity_error_1.q
then
{code}
# build hive
mvn clean install -Phadoop-2,dist -DskipTests
# build itest
cd itest
mvn clean install -Phadoop-2 -DskipTests
# build qtest
cd qtest
mvn clean install -Phadoop-2 -DskipTests
# run q test. it will overwrite q.out file
mvn test -Dtest=TestCliDriver -Dqfile=udf_cosine_similarity.q,show_functions.q
-Dtest.output.overwrite=true -Phadoop-2
# run negative q file test
mvn test -Dtest=TestNegativeCliDriver -Dqfile=udf_cosine_similarity_error_1.q
-Dtest.output.overwrite=true -Phadoop-2
{code}
> create UDF to measure strings similarity using Cosine Similarity algo
> ---------------------------------------------------------------------
>
> Key: HIVE-9557
> URL: https://issues.apache.org/jira/browse/HIVE-9557
> Project: Hive
> Issue Type: Improvement
> Components: UDF
> Reporter: Alexander Pivovarov
> Assignee: Nishant Kelkar
> Labels: CosineSimilarity, SimilarityMetric, UDF
> Attachments: udf_cosine_similarity-v01.patch
>
>
> algo description http://en.wikipedia.org/wiki/Cosine_similarity
> {code}
> --one word different, total 2 words
> str_sim_cosine('Test String1', 'Test String2') = (2 - 1) / 2 = 0.5f
> {code}
> reference implementation:
> https://github.com/Simmetrics/simmetrics/blob/master/src/uk/ac/shef/wit/simmetrics/similaritymetrics/CosineSimilarity.java
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