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https://issues.apache.org/jira/browse/HIVE-8620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14187273#comment-14187273
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Sergey Shelukhin commented on HIVE-8620:
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The patch is no good... it causes queries that CBO cannot handle to lose
columns again, because they add same column twice because it is mentioned twice
and it now works. I will look at another fix... probably the best long term fix
is to exterminate the horror that is RowResolver and write something sane
instead, where duplicates would never be allowed so there will be no
programming-by-coincidence ambiguity
> CBO: HIVE-8433 RowResolver check is too stringent
> -------------------------------------------------
>
> Key: HIVE-8620
> URL: https://issues.apache.org/jira/browse/HIVE-8620
> Project: Hive
> Issue Type: Bug
> Reporter: Sergey Shelukhin
> Assignee: Sergey Shelukhin
> Priority: Critical
> Attachments: HIVE-8620.patch
>
>
> Looks like it causes some valid queries to fail in CBO.
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