cloud-fan commented on a change in pull request #25111: [SPARK-28346][SQL]
clone the query plan between analyzer, optimizer and planner
URL: https://github.com/apache/spark/pull/25111#discussion_r302386743
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/command/SetCommand.scala
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@@ -168,4 +168,6 @@ case object ResetCommand extends RunnableCommand with
IgnoreCachedData {
sparkSession.sessionState.conf.clear()
Seq.empty[Row]
}
+
+ override def clone(): LogicalPlan = this
Review comment:
The `clone` defined in `TreeNode` doesn't work for case object.
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