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https://issues.apache.org/jira/browse/ARROW-14179?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-14179.
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Resolution: Fixed
Issue resolved by pull request 11280
[https://github.com/apache/arrow/pull/11280]
> [C++] Import/Export of UnionArray in C data interface has wrong buffer count
> ----------------------------------------------------------------------------
>
> Key: ARROW-14179
> URL: https://issues.apache.org/jira/browse/ARROW-14179
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Reporter: Roee Shlomo
> Assignee: Antoine Pitrou
> Priority: Blocker
> Labels: pull-request-available
> Fix For: 6.0.0
>
> Time Spent: 1.5h
> Remaining Estimate: 0h
>
> The C Data Interface implementation for UnionArray includes a validity buffer
> as the first buffer. However, union arrays should have no validity buffer
> according to the specification ([Arrow Columnar Format — Apache Arrow
> v5.0.0|https://arrow.apache.org/docs/format/Columnar.html#buffer-listing-for-each-layout])
>
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