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https://issues.apache.org/jira/browse/ARROW-17520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Weston Pace resolved ARROW-17520.
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Fix Version/s: 11.0.0
Resolution: Fixed
Issue resolved by pull request 14186
https://github.com/apache/arrow/pull/14186
> [C++] Implement SubStrait SetRel (UnionAll)
> -------------------------------------------
>
> Key: ARROW-17520
> URL: https://issues.apache.org/jira/browse/ARROW-17520
> Project: Apache Arrow
> Issue Type: New Feature
> Reporter: Donghe Kang
> Assignee: Vibhatha Lakmal Abeykoon
> Priority: Major
> Labels: pull-request-available
> Fix For: 11.0.0
>
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
> The SetRel operator in Substrait is a critical operator to merge data from
> several branches in the query plan. The operator has a few options like
> MINUS, INTERSECTION and UNION. The UNIONALL option that directly merges data
> flows is the foundation of other options and is easier to implement. As I
> know, Acero already has the union operator and we could easily map the
> UNIONALL in Substrait to the Union operator in Acero.
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