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From "Laljo John Pullokkaran (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-12590) Repeated UDAFs with literals can produce incorrect result
Date Thu, 10 Dec 2015 20:31:11 GMT

    [ https://issues.apache.org/jira/browse/HIVE-12590?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15051600#comment-15051600
] 

Laljo John Pullokkaran commented on HIVE-12590:
-----------------------------------------------

Obvious change was to remove lowercase conversion in Phase1.
However it seems deeper than that.

[~ashutoshc] Could you take a look? I have other stuff in my plate right now.

> Repeated UDAFs with literals can produce incorrect result
> ---------------------------------------------------------
>
>                 Key: HIVE-12590
>                 URL: https://issues.apache.org/jira/browse/HIVE-12590
>             Project: Hive
>          Issue Type: Bug
>          Components: Query Planning
>    Affects Versions: 1.0.1, 1.1.1, 1.2.1, 2.0.0
>            Reporter: Laljo John Pullokkaran
>            Assignee: Laljo John Pullokkaran
>            Priority: Critical
>
> Repeated UDAF with literals could produce wrong result.
> This is not a common use case, nevertheless a bug.
> hive> select max('pants'), max('pANTS') from t1 group by key;
>  Total MapReduce CPU Time Spent: 0 msec
> OK
> pANTS	pANTS
> pANTS	pANTS
> pANTS	pANTS
> pANTS	pANTS
> pANTS	pANTS
> Time taken: 296.252 seconds, Fetched: 5 row(s)



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