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https://issues.apache.org/jira/browse/ORC-753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gang Wu updated ORC-753:
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Description: 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.
> [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
>
> 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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