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From "Chun Chen (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-5357) ReduceSinkDeDuplication optimizer pick the wrong keys in pRS-cGBYm-cRS-cGBYr scenario when there are distinct keys in child GBY
Date Wed, 25 Sep 2013 06:28:04 GMT
Chun Chen created HIVE-5357:
-------------------------------

             Summary: ReduceSinkDeDuplication optimizer pick the wrong keys in pRS-cGBYm-cRS-cGBYr
scenario when there are distinct keys in child GBY
                 Key: HIVE-5357
                 URL: https://issues.apache.org/jira/browse/HIVE-5357
             Project: Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 0.11.0
            Reporter: Chun Chen
            Assignee: Chun Chen
             Fix For: 0.12.0


{code}
select key, count(distinct value) from (select key, value from src group by key, value) t
group by key;

//result
0 0 NULL
10  10  NULL
100 100 NULL
103 103 NULL
104 104 NULL
{code}

Obviously the result is wrong.



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