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From "Pengcheng Xiong (JIRA)" <>
Subject [jira] [Commented] (HIVE-9039) Support Union Distinct
Date Mon, 19 Jan 2015 18:20:34 GMT


Pengcheng Xiong commented on HIVE-9039:

can not understand why the tests failed. Rerun all of them on laptop and all got passed. resubmit
the patch

> Support Union Distinct
> ----------------------
>                 Key: HIVE-9039
>                 URL:
>             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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