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https://issues.apache.org/jira/browse/HIVE-5994?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13904141#comment-13904141
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Puneet Gupta commented on HIVE-5994:
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Will it affect positive values also? I am trying to write long
4703275633953830000L and I see some issues while reading back.
When I write 10 rows of same long value and read back , I get value as 112
instead.
When I write 1 or 100 rows of same long value and read back , I get correct
value back ! Not sure why ?
> 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
> Fix For: 0.13.0
>
> 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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