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https://issues.apache.org/jira/browse/SPARK-37371?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-37371:
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Assignee: (was: Apache Spark)
> UnionExec should support columnar if all children support columnar
> ------------------------------------------------------------------
>
> Key: SPARK-37371
> URL: https://issues.apache.org/jira/browse/SPARK-37371
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.3.0
> Reporter: L. C. Hsieh
> Priority: Major
>
> For UnionExec, if all its children support columnar, the union physical plan
> should be able to support columnar too as it is just union of all partitions
> from the children.
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