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https://issues.apache.org/jira/browse/ORC-24?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14655309#comment-14655309
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Aliaksei Sandryhaila commented on ORC-24:
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+1
> C++ reader for direct string encodings occasionally skips bytes
> ----------------------------------------------------------------
>
> Key: ORC-24
> URL: https://issues.apache.org/jira/browse/ORC-24
> Project: Orc
> Issue Type: Bug
> Components: C++
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Fix For: 1.0.0
>
> Attachments: ORC-24.patch
>
>
> The ORC C++ direct string column reader can occasionally skip bytes in the
> blob stream.
> The necessary conditions are:
> * The column is a string column and is directly encoded.
> * The blob stream for the row batch crosses a compression block boundary.
> * There is a null value toward the end of the block boundary.
> * The value in the length value of the null value crosses the block boundary,
> but the length value of the following value does not.
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