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From "Prasanth J (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-5994) ORC RLEv2 decodes wrongly for large negative BIGINTs (64 bits )
Date Tue, 10 Dec 2013 23:48:07 GMT

    [ https://issues.apache.org/jira/browse/HIVE-5994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13844829#comment-13844829
] 

Prasanth J commented on HIVE-5994:
----------------------------------

Test failure is unrelated. HIVE-5995 addresses the test failure.

> ORC RLEv2 decodes wrongly for large negative BIGINTs  (64 bits )
> ----------------------------------------------------------------
>
>                 Key: HIVE-5994
>                 URL: https://issues.apache.org/jira/browse/HIVE-5994
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.13.0
>            Reporter: Prasanth J
>            Assignee: Prasanth J
>              Labels: orcfile
>         Attachments: HIVE-5994.1.patch
>
>
> For large negative BIGINTs, zigzag encoding will yield large value (64bit value) with
MSB set to 1. This value is interpreted as negative value in SerializationUtils.findClosestNumBits(long
value) function. This resulted in wrong computation of total number of bits required which
results in wrong encoding/decoding of values.



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