cloud-fan commented on code in PR #49715:
URL: https://github.com/apache/spark/pull/49715#discussion_r1944012306
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sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/AdaptiveSparkPlanExec.scala:
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@@ -579,23 +592,52 @@ case class AdaptiveSparkPlanExec(
allChildStagesMaterialized = false,
newStages = Seq(newStage))
- case q: QueryStageExec =>
+ case q: QueryStageExec if q ne currentPhysicalPlan =>
assertStageNotFailed(q)
CreateStageResult(newPlan = q,
allChildStagesMaterialized = q.isMaterialized, newStages = Seq.empty)
case _ =>
- if (plan.children.isEmpty) {
- CreateStageResult(newPlan = plan, allChildStagesMaterialized = true,
newStages = Seq.empty)
+ // This includes cases where root node is QueryStageExec
+ val results = plan.children.map(createQueryStages(resultHandler, _,
firstRun))
+ val allChildStagesMaterialized =
results.forall(_.allChildStagesMaterialized)
+ val newStages = results.flatMap(_.newStages)
+ if ((plan eq currentPhysicalPlan) && allChildStagesMaterialized &&
newStages.isEmpty) {
+ // Create result stage if the plan is root plan and all children
stages are materialized
+ // and no new stages are created.
+ val resultStage = createResultQueryStage(resultHandler, plan)
+ stagesToReplace.append(resultStage)
+ CreateStageResult(
+ newPlan = resultStage,
+ allChildStagesMaterialized = false,
+ newStages = Seq(resultStage))
} else {
- val results = plan.children.map(createQueryStages)
+ val newPlan = if (results.isEmpty) {
+ plan
+ } else {
+ plan.withNewChildren(results.map(_.newPlan))
+ }
CreateStageResult(
- newPlan = plan.withNewChildren(results.map(_.newPlan)),
- allChildStagesMaterialized =
results.forall(_.allChildStagesMaterialized),
- newStages = results.flatMap(_.newStages))
+ newPlan = newPlan,
+ allChildStagesMaterialized = allChildStagesMaterialized,
+ newStages = newStages)
}
}
+ private def createResultQueryStage(
+ resultHandler: SparkPlan => Any,
Review Comment:
nit: 4 spaces indentation
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