Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7434#discussion_r34759860
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
---
@@ -277,15 +276,21 @@ abstract class LogicalPlan extends
QueryPlan[LogicalPlan] with Logging {
/**
* A logical plan node with no children.
*/
-abstract class LeafNode extends LogicalPlan with
trees.LeafNode[LogicalPlan] {
+abstract class LeafNode extends LogicalPlan {
self: Product =>
+
+ override def children: Seq[LogicalPlan] = Nil
}
/**
* A logical plan node with single child.
*/
-abstract class UnaryNode extends LogicalPlan with
trees.UnaryNode[LogicalPlan] {
+abstract class UnaryNode extends LogicalPlan {
self: Product =>
--- End diff --
it's still required
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