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(Updated June 29, 2015, 9:24 p.m.) Review request for hive and Alexander Pivovarov. Changes ------- Removed dependency on commons-math3 FastMath class. Repository: hive-git Description ------- 1. Added preliminary UDF code for cosine similarity. 2. Added unit tests and integration tests. 3. Registered the UDF in the FunctionRegistry class. Diffs (updated) ----- .reviewboardrc abc33f91a44b76573cbba334c33417307c63956f ql/src/java/org/apache/hadoop/hive/ql/exec/FunctionRegistry.java fabc21e2092561cbf98c35a406e4ee40e71fe1de ql/src/java/org/apache/hadoop/hive/ql/udf/UDFCosineSimilarity.java PRE-CREATION ql/src/test/org/apache/hadoop/hive/ql/udf/TestUDFCosineSimilarity.java PRE-CREATION ql/src/test/queries/clientnegative/udf_cosine_similarity_error_1.q PRE-CREATION ql/src/test/queries/clientnegative/udf_cosine_similarity_wrongargs_1.q PRE-CREATION ql/src/test/queries/clientnegative/udf_cosine_similarity_wrongargs_2.q PRE-CREATION ql/src/test/queries/clientnegative/udf_cosine_similarity_wrongargs_3.q PRE-CREATION ql/src/test/queries/clientpositive/udf_cosine_similarity.q PRE-CREATION ql/src/test/results/clientnegative/udf_cosine_similarity_error_1.q.out PRE-CREATION ql/src/test/results/clientnegative/udf_cosine_similarity_error_2.q.out PRE-CREATION ql/src/test/results/clientnegative/udf_cosine_similarity_wrongargs_1.q.out PRE-CREATION ql/src/test/results/clientnegative/udf_cosine_similarity_wrongargs_2.q.out PRE-CREATION ql/src/test/results/clientnegative/udf_cosine_similarity_wrongargs_3.q.out PRE-CREATION ql/src/test/results/clientpositive/show_functions.q.out 5de4ffcd1ace477af026b83fb7bfb8068fc192b3 ql/src/test/results/clientpositive/udf_cosine_similarity.q.out PRE-CREATION Diff: https://reviews.apache.org/r/35968/diff/ Testing ------- Function signature of the UDF is: cosine_similarity(Text, Text, Text) Each "Text" can be one of {S=something,E=empty,N=null} Unit tests written for the following cases: 1. cosine_similarity(S, S, S) 2. cosine_similarity(S, E, S) 3. cosine_similarity(N, E, S) 4. cosine_similarity(S, S, E) 5. cosine_similarity(N, N, N) Thanks, Nishant Kelkar