AngersZhuuuu commented on code in PR #46523:
URL: https://github.com/apache/spark/pull/46523#discussion_r1599275544


##########
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/AQEPropagateEmptyRelation.scala:
##########
@@ -82,6 +82,11 @@ object AQEPropagateEmptyRelation extends 
PropagateEmptyRelationBase {
     case _ => false
   }
 
+  override protected def canPropagate(plan: LogicalPlan): Boolean = plan match 
{
+    case LogicalQueryStage(_, _: BroadcastQueryStageExec) => false

Review Comment:
   Done



##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/PropagateEmptyRelation.scala:
##########
@@ -65,6 +65,8 @@ abstract class PropagateEmptyRelationBase extends 
Rule[LogicalPlan] with CastSup
   private def nullValueProjectList(plan: LogicalPlan): Seq[NamedExpression] =
     plan.output.map{ a => Alias(cast(Literal(null), a.dataType), 
a.name)(a.exprId) }
 
+  protected def canPropagate(plan: LogicalPlan): Boolean = true

Review Comment:
   Done



##########
sql/core/src/test/scala/org/apache/spark/sql/execution/adaptive/AdaptiveQueryExecSuite.scala:
##########
@@ -2772,6 +2778,30 @@ class AdaptiveQueryExecSuite
     }
   }
 
+  test("SPARK-48155: AQEPropagateEmptyRelation check remained child for join") 
{
+    withSQLConf(
+      SQLConf.ADAPTIVE_EXECUTION_ENABLED.key -> "true") {
+      val (_, adaptivePlan) = runAdaptiveAndVerifyResult(
+        """
+          |SELECT /*+ BROADCAST(t3) */ t3.b, count(t3.a) FROM testData2 t1

Review Comment:
   Done



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