cloud-fan commented on a change in pull request #29104:
URL: https://github.com/apache/spark/pull/29104#discussion_r460767934
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/joins/BroadcastHashJoinExec.scala
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@@ -454,6 +490,43 @@ case class BroadcastHashJoinExec(
val (matched, checkCondition, _) = getJoinCondition(ctx, input)
val numOutput = metricTerm(ctx, "numOutputRows")
+ if (isNullAwareAntiJoin) {
+ if (broadcastRelation.value.isInstanceOf[EmptyHashedRelation]) {
+ return s"""
+ |// NAAJ Join EmptyHashedRelation accept all
Review comment:
`NAAJ` already means Join. How about `If the right side is empty, NAAJ
simply returns the left side.`
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