cloud-fan commented on a change in pull request #29726:
URL: https://github.com/apache/spark/pull/29726#discussion_r487866106
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/dynamicpruning/PartitionPruning.scala
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@@ -196,6 +198,25 @@ object PartitionPruning extends Rule[LogicalPlan] with
PredicateHelper {
case _ => false
}
+ /**
+ * For some filtering side can not broadcast by join type but can broadcast
by size,
+ * then we should not consider reuse broadcast only, for example:
+ * Left outer join and left side very small.
+ */
+ private def isReuseBroadcastOnly(
+ canBuildBroadcast: Boolean,
+ hasBenefit: Boolean,
+ hintToBroadcastPruningSide: Boolean,
+ pruningPlan: LogicalPlan,
+ filteringPlan: LogicalPlan): Boolean = {
+ if (canBuildBroadcast) {
+ !hasBenefit || SQLConf.get.dynamicPartitionPruningReuseBroadcastOnly
+ } else {
+ !(hasBenefit && canBroadcastBySize(filteringPlan, SQLConf.get) &&
+ !hintToBroadcastPruningSide && !canBroadcastBySize(pruningPlan,
SQLConf.get))
Review comment:
`!canBroadcastBySize(pruningPlan, SQLConf.get)` do we need this
condition?
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