Review Request 12767: [HIVE-4877] In ExecReducer, remove tag from the row which will be passed to the first Operator at the Reduce-side

[Yin Huai]

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https://reviews.apache.org/r/12767/
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Review request for hive.


Bugs: HIVE-4877
    https://issues.apache.org/jira/browse/HIVE-4877


Repository: hive-git


Description
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https://issues.apache.org/jira/browse/HIVE-4877


Diffs
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  data/files/kv1kv2.cogroup.txt 6d36e22 
  ql/src/java/org/apache/hadoop/hive/ql/exec/DemuxOperator.java 9898495 
  ql/src/java/org/apache/hadoop/hive/ql/exec/MuxOperator.java d4be3d9 
  ql/src/java/org/apache/hadoop/hive/ql/exec/Operator.java ee76917 
  ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java cbda70b 
  ql/src/java/org/apache/hadoop/hive/ql/exec/mr/ExecReducer.java d12a53c 
  ql/src/test/org/apache/hadoop/hive/ql/exec/TestExecDriver.java 6a74ae4 

Diff: https://reviews.apache.org/r/12767/diff/


Testing
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Tests   Failures        Errors  Success rate    Time
2688    2               0       99.93%          43249.945

Two failures are hbase_stats_empty_partition.q and ppd_key_ranges.q in 
TestHBaseCliDriver.

I manually tested these two in my mac and tests passed. 


Thanks,

Yin Huai