cloud-fan commented on a change in pull request #27226: [SPARK-30524] [SQL]
Disable OptimizeSkewedJoin rule when introducing additional shuffle
URL: https://github.com/apache/spark/pull/27226#discussion_r367228040
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/OptimizeSkewedJoin.scala
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@@ -114,25 +120,56 @@ case class OptimizeSkewedJoin(conf: SQLConf) extends
Rule[SparkPlan] {
stage.shuffle.shuffleDependency.rdd.partitions.length
}
- def handleSkewJoin(plan: SparkPlan): SparkPlan = plan.transformUp {
- case smj @ SortMergeJoinExec(leftKeys, rightKeys, joinType, condition,
- s1 @ SortExec(_, _, left: ShuffleQueryStageExec, _),
- s2 @ SortExec(_, _, right: ShuffleQueryStageExec, _))
- if supportedJoinTypes.contains(joinType) =>
+ private def containShuffleQueryStage(plan : SparkPlan): (Boolean,
ShuffleQueryStageExec) =
Review comment:
why not just return `Option[ShuffleQueryStageExec]`? we can rename the
method to `getShuffleQueryStage`
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