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https://issues.apache.org/jira/browse/ARROW-4975?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Kietzman reassigned ARROW-4975:
-----------------------------------
Assignee: (was: Ben Kietzman)
> [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
> Priority: Minor
>
> https://github.com/apache/arrow/pull/3746 adds support for concatenation of
> arrays, but UnionArrays are not supported.
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