[SPARK-21072] `TreeNode.mapChildren` should only apply to the children node.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.1.1
• Fix Version/s: 2.1.2, 2.2.0
• Component/s: SQL
• Assignee: Xianyang Liu
• Reporter: Xianyang Liu
• Created: 13/Jun/17 05:11
• Updated: 16/Jun/17 04:11
• Resolved: 16/Jun/17 04:11

Description

Just as the function name and comments of `TreeNode.mapChildren` mentioned, the function should be apply to all currently node children. So, the follow code should judge whether it is the children node.

https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala#L342

Issue Links

• links to: [Github] Pull Request #18284 (ConeyLiu)