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https://issues.apache.org/jira/browse/ARROW-13479?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17396408#comment-17396408
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Micah Kornfield commented on ARROW-13479:
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Hmm, I would have thought strictly, but I don't know the implications of
changing it at this point.
> [Format] Make requirement around dense union offsets less ambiguous
> -------------------------------------------------------------------
>
> Key: ARROW-13479
> URL: https://issues.apache.org/jira/browse/ARROW-13479
> Project: Apache Arrow
> Issue Type: Task
> Components: Format
> Reporter: Antoine Pitrou
> Priority: Major
> Fix For: 6.0.0
>
>
> Currently, the spec states that dense union offsets for each child array must
> be "in order / increasing". There is an ambiguity: should they be strictly
> increasing, or are equal values supported?
> The C++ implementation currently considers that equal offsets are acceptable.
>
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