JkSelf commented on a change in pull request #26207: [SPARK-29552][SQL] Execute
the "OptimizeLocalShuffleReader" rule when creating new query stage and then
can optimize the shuffle reader to local shuffle reader as much as possible.
URL: https://github.com/apache/spark/pull/26207#discussion_r337850726
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/AdaptiveSparkPlanExec.scala
##########
@@ -92,6 +92,9 @@ case class AdaptiveSparkPlanExec(
// optimizations should be stage-independent.
@transient private val queryStageOptimizerRules: Seq[Rule[SparkPlan]] = Seq(
ReuseAdaptiveSubquery(conf, subqueryCache),
+ // Here we need put the OptimizeLocalShuffleReader rule before
+ // ReduceNumShufflePartitions rule to avoid the further optimizaiton.
Review comment:
Updated.
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