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From "Pengcheng Xiong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-9039) Support Union Distinct
Date Mon, 19 Jan 2015 21:47:35 GMT

    [ https://issues.apache.org/jira/browse/HIVE-9039?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14283055#comment-14283055
] 

Pengcheng Xiong commented on HIVE-9039:
---------------------------------------

[~jpullokkaran], 2 out of 4 failures testCliDriver_groupby_grouping_window and TestMTQueries.testMTQueries1
also fails in the next test in QA, thus, it is not related. The "org.apache.hive.hcatalog.hbase.TestPigHBaseStorageHandler.org.apache.hive.hcatalog.hbase.TestPigHBaseStorageHandler
" query failure seems unrelated. Thus, it is ready to go. Thanks.

> 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
>
>
> 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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