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https://issues.apache.org/jira/browse/HIVE-15938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15872822#comment-15872822
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Pengcheng Xiong commented on HIVE-15938:
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Thanks for [~sershe]'s efforts. The patch LGTM. I just have one doubt. If you
try, you will find out that postgres actually supports select * from t order by
1. I am thinking that after HIVE-15160, supporting order by number in select *
would be straight forward.
> position alias in order by fails for union queries
> --------------------------------------------------
>
> Key: HIVE-15938
> URL: https://issues.apache.org/jira/browse/HIVE-15938
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Attachments: HIVE-15938.01.patch, HIVE-15938.02.patch,
> HIVE-15938.03.patch, HIVE-15938.04.patch, HIVE-15938.patch
>
>
> The problem is that the query introduces a spurious ALLCOLREF
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