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https://issues.apache.org/jira/browse/ARROW-4975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17661997#comment-17661997
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Rok Mihevc commented on ARROW-4975:
-----------------------------------
This issue has been migrated to [issue
#16035|https://github.com/apache/arrow/issues/16035] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [C++] Support concatenation of UnionArrays
> ------------------------------------------
>
> Key: ARROW-4975
> URL: https://issues.apache.org/jira/browse/ARROW-4975
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Ben Kietzman
> Assignee: Matthijs Brobbel
> Priority: Minor
> Labels: good-first-issue, good-second-issue,
> pull-request-available
> Fix For: 7.0.0
>
> Time Spent: 1h 50m
> Remaining Estimate: 0h
>
> https://github.com/apache/arrow/pull/3746 adds support for concatenation of
> arrays, but UnionArrays are not supported.
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