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Posted to dev@hive.apache.org by "Prasanth J (JIRA)" <ji...@apache.org> on 2013/12/11 02:14:07 UTC

[jira] [Updated] (HIVE-5994) ORC RLEv2 encodes wrongly for large negative BIGINTs (64 bits )

     [ https://issues.apache.org/jira/browse/HIVE-5994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prasanth J updated HIVE-5994:
-----------------------------

    Summary: ORC RLEv2 encodes wrongly for large negative BIGINTs  (64 bits )  (was: ORC RLEv2 decodes wrongly for large negative BIGINTs  (64 bits ))

> ORC RLEv2 encodes 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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