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https://issues.apache.org/jira/browse/HIVE-339?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Namit Jain updated HIVE-339:
----------------------------

    Status: Patch Available  (was: Open)

added a lot more comments.

Need iterate at reduce-side because it is possible that the map-aide 
aggregation was turned off at runtime 
and then distinct need to be eliminated

> [Hive] problem in count distinct in 1mapreduce job with map side aggregation
> ----------------------------------------------------------------------------
>
>                 Key: HIVE-339
>                 URL: https://issues.apache.org/jira/browse/HIVE-339
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Namit Jain
>            Assignee: Namit Jain
>         Attachments: hive.339.1.patch, hive.339.2.patch, hive.339.3.patch
>
>


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