[jira] Created: (HIVE-391) udafcount merge does not handle nulls

[Namit Jain (JIRA)]

udafcount merge does not handle nulls
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                 Key: HIVE-391
                 URL: https://issues.apache.org/jira/browse/HIVE-391
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 0.3.0
            Reporter: Namit Jain
            Assignee: Namit Jain
            Priority: Blocker


udafcount merge does not handle nulls

If the mapper does not emit any row on null input, i.e both count and count 
distinct are present, and the aggregation function is count, 
it will get a null pointer


select count(1), count(distinct x.value) from src x where x.key = 9999;

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