leanken commented on a change in pull request #29104:
URL: https://github.com/apache/spark/pull/29104#discussion_r457455756
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoinExec.scala
##########
@@ -64,10 +65,32 @@ case class BroadcastHashJoinExec(
val numOutputRows = longMetric("numOutputRows")
val broadcastRelation = buildPlan.executeBroadcast[HashedRelation]()
- streamedPlan.execute().mapPartitions { streamedIter =>
- val hashed = broadcastRelation.value.asReadOnlyCopy()
-
TaskContext.get().taskMetrics().incPeakExecutionMemory(hashed.estimatedSize)
- join(streamedIter, hashed, numOutputRows)
+ if (isNullAwareAntiJoin) {
+ streamedPlan.execute().mapPartitionsInternal { streamedIter =>
+ if (broadcastRelation.value.inputEmpty) {
+ streamedIter
+ } else if (broadcastRelation.value.anyNullKeyExists) {
Review comment:
and this is why it planed into BroadcastNestedLoopJoinExec, it demand
M*N calculation to
eval condition Or(EqualTo(a=b), IsNull(EqualTo(a=b))
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
