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https://issues.apache.org/jira/browse/ARROW-10580?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou resolved ARROW-10580.
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Resolution: Fixed
Issue resolved by pull request 9794
[https://github.com/apache/arrow/pull/9794]
> [C++] When Validating, ensure DenseUnionArray offsets are increasing
> --------------------------------------------------------------------
>
> Key: ARROW-10580
> URL: https://issues.apache.org/jira/browse/ARROW-10580
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 2.0.0
> Reporter: Ben Kietzman
> Assignee: Antoine Pitrou
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> https://github.com/apache/arrow/pull/8652#discussion_r522332386
> The format documentation states that "The respective offsets for each child
> value array must be in order / increasing."
> https://arrow.apache.org/docs/format/Columnar.html#dense-union
> However this is not currently checked in {{Array::ValidateFull}}
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