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From "Gopal V (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-6786) Off by one error in ORC PPD
Date Sun, 30 Mar 2014 15:34:14 GMT

    [ https://issues.apache.org/jira/browse/HIVE-6786?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13954713#comment-13954713
] 

Gopal V commented on HIVE-6786:
-------------------------------

[~prasanth_j]: This is an old ORC 10Tb database which hasn't been modified for a while now.

> Off by one error in ORC PPD 
> ----------------------------
>
>                 Key: HIVE-6786
>                 URL: https://issues.apache.org/jira/browse/HIVE-6786
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.13.0
>            Reporter: Gopal V
>            Assignee: Prasanth J
>            Priority: Critical
>             Fix For: 0.13.0
>
>         Attachments: HIVE-6786.1.patch
>
>
> Turning on ORC PPD makes split computation fail for a 10Tb benchmark.
> Narrowed down to the following code fragment
> https://github.com/apache/hive/blob/branch-0.13/ql/src/java/org/apache/hadoop/hive/ql/io/orc/OrcInputFormat.java#L757
> {code}
>                 includeStripe[i] = (i > stripeStats.size()) ||
>                     isStripeSatisfyPredicate(stripeStats.get(i), sarg,
>                                              filterColumns);
> {code}
> I would guess that should be a >=, but [~prasanth_j], can you comment if that is the
right fix?



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