Maryann Xue created SPARK-28057:
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Summary: Add method `clone` in catalyst TreeNode
Key: SPARK-28057
URL: https://issues.apache.org/jira/browse/SPARK-28057
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Maryann Xue
Add implementation for {{clone}} method in {{TreeNode}}, for de-duplicating
instances in the LogicalPlan tree. This is a prerequisite for SPARK-23128.
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