cloud-fan commented on a change in pull request #31756:
URL: https://github.com/apache/spark/pull/31756#discussion_r629425441
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/PlanAdaptiveDynamicPruningFilters.scala
##########
@@ -44,12 +42,23 @@ case class PlanAdaptiveDynamicPruningFilters(
val mode = HashedRelationBroadcastMode(packedKeys)
// plan a broadcast exchange of the build side of the join
val exchange = BroadcastExchangeExec(mode, adaptivePlan.executedPlan)
- val existingStage = stageCache.get(exchange.canonicalized)
- if (existingStage.nonEmpty && conf.exchangeReuseEnabled) {
- val name = s"dynamicpruning#${exprId.id}"
- val reuseQueryStage = existingStage.get.newReuseInstance(0,
exchange.output)
- val broadcastValues =
- SubqueryBroadcastExec(name, index, buildKeys, reuseQueryStage)
+
+ val canReuseExchange = conf.exchangeReuseEnabled && buildKeys.nonEmpty
&&
+ rootPlan.find {
+ case BroadcastHashJoinExec(_, _, _, BuildLeft, _, left, _, _) =>
+ left.sameResult(exchange)
+ case BroadcastHashJoinExec(_, _, _, BuildRight, _, _, right, _) =>
+ right.sameResult(exchange)
+ case _ => false
+ }.isDefined
+
+ if (canReuseExchange) {
+ exchange.setLogicalLink(adaptivePlan.executedPlan.logicalLink.get)
+ val newAdaptivePlan = AdaptiveSparkPlanExec(
+ exchange, adaptivePlan.context, adaptivePlan.preprocessingRules,
true)
Review comment:
ditto: `adaptivePlan.copy(inputPlan = exchange)`
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