maryannxue commented on a change in pull request #28676:
URL: https://github.com/apache/spark/pull/28676#discussion_r434999296
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoinExec.scala
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@@ -60,6 +60,26 @@ case class BroadcastHashJoinExec(
}
}
+ override def outputPartitioning: Partitioning = {
+ def buildKeys: Seq[Expression] = buildSide match {
+ case BuildLeft => leftKeys
+ case BuildRight => rightKeys
+ }
+
+ joinType match {
+ case _: InnerLike =>
+ streamedPlan.outputPartitioning match {
+ case h: HashPartitioning =>
+ PartitioningCollection(Seq(h, HashPartitioning(buildKeys,
h.numPartitions)))
Review comment:
This is only true when t1 is partitioned on "a" then because a == b, so
"t1 join t2" is partitioned on "b".
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