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https://issues.apache.org/jira/browse/ORC-2225?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yuanping Wu resolved ORC-2225.
------------------------------
Fix Version/s: 3.0.0
Resolution: Fixed
Issue resolved by pull request 2726
[https://github.com/apache/orc/pull/2726]
> [C++] FLOAT statistics use values before binary32 narrowing
> -----------------------------------------------------------
>
> Key: ORC-2225
> URL: https://issues.apache.org/jira/browse/ORC-2225
> Project: ORC
> Issue Type: Bug
> Components: C++
> Reporter: Nathan Chandrasekar
> Priority: Major
> Fix For: 3.0.0
>
>
> The default C++ writer stores FLOAT statistics from the double input before
> narrowing it to binary32. A one-row file containing {{0.1}} returns no rows
> for an equality search argument whose literal exactly equals the stored FLOAT
> value.
> In {{FloatingColumnWriter::add}}, DATA uses
> {{static_cast<float>(doubleData[i])}}, while statistics use the original
> double. Statistics should use the value serialized as FLOAT.
> Reproducer and observed output: https://github.com/apache/orc/issues/2719
> — [ChipLab|https://chiplab.donmakino.com/findings#clab-2026-863]
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