1 files changed, 3 insertions, 3 deletions
diff --git a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
index 6d7799151d..09725473a3 100644
--- a/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
+++ b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
@@ -276,7 +276,7 @@ abstract class LogicalPlan extends QueryPlan[LogicalPlan] with Logging {
  * A logical plan node with no children.
  */
 abstract class LeafNode extends LogicalPlan {
-  override def children: Seq[LogicalPlan] = Nil
+  override final def children: Seq[LogicalPlan] = Nil
   override def producedAttributes: AttributeSet = outputSet
 }
 
@@ -286,7 +286,7 @@ abstract class LeafNode extends LogicalPlan {
 abstract class UnaryNode extends LogicalPlan {
   def child: LogicalPlan
 
-  override def children: Seq[LogicalPlan] = child :: Nil
+  override final def children: Seq[LogicalPlan] = child :: Nil
 
   /**
    * Generates an additional set of aliased constraints by replacing the original constraint
@@ -330,5 +330,5 @@ abstract class BinaryNode extends LogicalPlan {
   def left: LogicalPlan
   def right: LogicalPlan
 
-  override def children: Seq[LogicalPlan] = Seq(left, right)
+  override final def children: Seq[LogicalPlan] = Seq(left, right)
 }