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Posted to issues@orc.apache.org by "Quanlong Huang (Jira)" <ji...@apache.org> on 2022/03/29 01:04:00 UTC

[jira] [Resolved] (ORC-753) [C++] Clear stream state of ColumnReader after seek

     [ https://issues.apache.org/jira/browse/ORC-753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Quanlong Huang resolved ORC-753.
--------------------------------
    Fix Version/s: 1.7.0
       Resolution: Fixed

This is resolved by https://github.com/apache/orc/pull/645

> [C++] Clear stream state of ColumnReader after seek
> ---------------------------------------------------
>
>                 Key: ORC-753
>                 URL: https://issues.apache.org/jira/browse/ORC-753
>             Project: ORC
>          Issue Type: Bug
>          Components: C++
>            Reporter: Gang Wu
>            Assignee: Gang Wu
>            Priority: Major
>             Fix For: 1.7.0
>
>
> C++ ORC ColumnReaders of some types have cached buffer state to issue next I/O. This is fine if we read streams continuously. However, if we try to skip some row groups and seek to a random row group, the cached buffer state is wrong and may lead to undefined behavior.



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