cloud-fan commented on a change in pull request #27253: [SPARK-30524] [SQL]
follow up SPARK-30524 to resolve comments
URL: https://github.com/apache/spark/pull/27253#discussion_r367907300
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/OptimizeSkewedJoin.scala
##########
@@ -222,6 +203,8 @@ case class OptimizeSkewedJoin(conf: SQLConf) extends
Rule[SparkPlan] {
case shuffleStage: ShuffleQueryStageExec if shuffleStage.id ==
left.id ||
Review comment:
sorry I was totally wrong. We are updating the smj here, why not just
```
val optimizedSmj = smj.copy(
left = s1.copy(child = PartialShuffleReaderExec(left,
skewedPartitions.toSet)),
right = s2.copy(child = PartialShuffleReaderExec(right,
skewedPartitions.toSet)),
isPartial = true
)
```
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