diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicPhysicalOperators.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicPhysicalOperators.scala
index 18142c44f029..8389e2f3d5be 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/basicPhysicalOperators.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/basicPhysicalOperators.scala
@@ -267,6 +267,10 @@ case class SampleExec(
     }
   }
 
+  // Mark this as empty. This plan doesn't need to evaluate any inputs and can defer the evaluation
+  // to the parent operator.
+  override def usedInputs: AttributeSet = AttributeSet.empty
+
   override def inputRDDs(): Seq[RDD[InternalRow]] = {
     child.asInstanceOf[CodegenSupport].inputRDDs()
   }
diff --git a/sql/core/src/main/scala/org/apache/spark/sql/execution/limit.scala b/sql/core/src/main/scala/org/apache/spark/sql/execution/limit.scala
index 73a0f8735ed4..1f515e29b4af 100644
--- a/sql/core/src/main/scala/org/apache/spark/sql/execution/limit.scala
+++ b/sql/core/src/main/scala/org/apache/spark/sql/execution/limit.scala
@@ -62,6 +62,10 @@ trait BaseLimitExec extends UnaryExecNode with CodegenSupport {
     child.asInstanceOf[CodegenSupport].inputRDDs()
   }
 
+  // Mark this as empty. This plan doesn't need to evaluate any inputs and can defer the evaluation
+  // to the parent operator.
+  override def usedInputs: AttributeSet = AttributeSet.empty
+
   protected override def doProduce(ctx: CodegenContext): String = {
     child.asInstanceOf[CodegenSupport].produce(ctx, this)
   }