Yesheng Ma created SPARK-28127:
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Summary: Micro optimization on TreeNode's mapChildren method
Key: SPARK-28127
URL: https://issues.apache.org/jira/browse/SPARK-28127
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Yesheng Ma
The {{mapChildren}} method in the {{TreeNode}} class is commonly used. In this
method, there's a if statement checking non-empty children. However, there's a
cached lazy val {{containsChild}}, which avoids unnecessary computation since
this {{containsChild}} is used in other methods anyway.
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