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Posted to dev@hive.apache.org by "Pengcheng Xiong (JIRA)" <ji...@apache.org> on 2014/12/08 07:05:12 UTC

[jira] [Created] (HIVE-9039) Support Union Distinct

Pengcheng Xiong created HIVE-9039:
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             Summary: Support Union Distinct
                 Key: HIVE-9039
                 URL: https://issues.apache.org/jira/browse/HIVE-9039
             Project: Hive
          Issue Type: New Feature
            Reporter: Pengcheng Xiong


Current version (Hive 0.14) does not support union (or union distinct). It only supports union all. In this patch, we try to add this new feature by rewriting union distinct to union all followed by group by.



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