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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8620) CBO: HIVE-8433 RowResolver check is too stringent
Date Tue, 28 Oct 2014 18:49:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8620?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14187273#comment-14187273
] 

Sergey Shelukhin commented on HIVE-8620:
----------------------------------------

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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