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https://issues.apache.org/jira/browse/HIVE-9053?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14245445#comment-14245445
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Pengcheng Xiong commented on HIVE-9053:
---------------------------------------
Good to hear that all tests passed. I still would like to investigate another
small corner issue before checked in... Thanks!
> select constant in union all followed by group by gives wrong result
> --------------------------------------------------------------------
>
> Key: HIVE-9053
> URL: https://issues.apache.org/jira/browse/HIVE-9053
> Project: Hive
> Issue Type: Bug
> Reporter: Pengcheng Xiong
> Assignee: Pengcheng Xiong
> Attachments: HIVE-9053.01.patch, HIVE-9053.02.patch,
> HIVE-9053.03.patch
>
>
> Here is the the way to reproduce with q test:
> select key from (select '1' as key from src union all select key from src)tab
> group by key;
> will give
> OK
> NULL
> 1
> This is not correct as src contains many other keys.
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