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Posted to dev@hive.apache.org by "Laljo John Pullokkaran (JIRA)" <ji...@apache.org> on 2015/02/04 00:38:35 UTC

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

     [ https://issues.apache.org/jira/browse/HIVE-9039?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Laljo John Pullokkaran updated HIVE-9039:
-----------------------------------------
    Status: Open  (was: Patch Available)

> Support Union Distinct
> ----------------------
>
>                 Key: HIVE-9039
>                 URL: https://issues.apache.org/jira/browse/HIVE-9039
>             Project: Hive
>          Issue Type: New Feature
>            Reporter: Pengcheng Xiong
>            Assignee: Pengcheng Xiong
>         Attachments: HIVE-9039.01.patch, HIVE-9039.02.patch, HIVE-9039.03.patch, HIVE-9039.04.patch, HIVE-9039.05.patch, HIVE-9039.06.patch, HIVE-9039.07.patch, HIVE-9039.08.patch, HIVE-9039.09.patch, HIVE-9039.10.patch, HIVE-9039.11.patch, HIVE-9039.12.patch, HIVE-9039.13.patch, HIVE-9039.14.patch, HIVE-9039.15.patch, HIVE-9039.16.patch, HIVE-9039.17.patch, HIVE-9039.18.patch, HIVE-9039.19.patch, HIVE-9039.20.patch, HIVE-9039.21.patch
>
>
> CLEAR LIBRARY CACHE
> 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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