maryannxue 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_r367512908
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/SortMergeJoinExec.scala
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@@ -95,8 +96,20 @@ case class SortMergeJoinExec(
s"${getClass.getSimpleName} should not take $x as the JoinType")
}
- override def requiredChildDistribution: Seq[Distribution] =
- HashClusteredDistribution(leftKeys) ::
HashClusteredDistribution(rightKeys) :: Nil
+ private def containSkewedReader(plan: SparkPlan): Boolean = plan match {
Review comment:
Use `find`?
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