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From "Navis Ryu" <>
Subject Re: Review Request: HIVE-2329 RS dedup optimization shoud be avoided in some cases
Date Wed, 07 Dec 2011 08:15:06 GMT

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(Updated 2011-12-07 08:15:06.858543)

Review request for hive, John Sichi and Carl Steinbach.


rebased to trunk


If map aggregation is set to false, DISTRIBUTED BY followed by GROUP BY with same key fails
in runtime. ReduceSinkDeDuplication optimization should be avoid if child of child RS is GBY.

This addresses bug HIVE-2329.

Diffs (updated)

  ql/src/java/org/apache/hadoop/hive/ql/optimizer/ e91b4d5 
  ql/src/test/queries/clientpositive/reduce_deduplicate_exclude_gby.q PRE-CREATION 
  ql/src/test/results/clientpositive/reduce_deduplicate_exclude_gby.q.out PRE-CREATION 


Testing (updated)

test added : reduce_deduplicate_exclude_gby.q



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