[SPARK-37371] UnionExec should support columnar if all children support columnar

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Resolved
• Affects Version/s: 3.3.0
• Fix Version/s: 3.3.0
• Component/s: SQL
• Assignee: L. C. Hsieh
• Reporter: L. C. Hsieh
• Created: 18/Nov/21 08:53
• Updated: 19/Nov/21 03:17
• Resolved: 19/Nov/21 03:17

Description

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.

Issue Links

• links to: [Github] Pull Request #34645 (viirya)