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Review request for hive. Summary ------- Mostly copied from existing code. Not tested intensively yet, but it is seemed to be used frequently for us. Diffs ----- ql/src/test/queries/clientpositive/reduce_deduplicate_extended.q PRE-CREATION ql/src/java/org/apache/hadoop/hive/ql/optimizer/ColumnPrunerProcFactory.java 82a141d ql/src/java/org/apache/hadoop/hive/ql/optimizer/ReduceSinkDeDuplication.java e91b4d5 ql/src/test/results/clientpositive/reduce_deduplicate_extended.q.out PRE-CREATION Diff: https://reviews.apache.org/r/2991/diff Testing ------- new test cases added : reduce_deduplicate_extended.q Thanks, Navis
