L. C. Hsieh created SPARK-37371:
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Summary: 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
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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