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https://issues.apache.org/jira/browse/SPARK-21072?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-21072:
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Assignee: Apache Spark
> `TreeNode.mapChildren` should only apply to the children node.
> ---------------------------------------------------------------
>
> Key: SPARK-21072
> URL: https://issues.apache.org/jira/browse/SPARK-21072
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.1.1
> Reporter: coneyliu
> Assignee: Apache Spark
>
> 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]
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