cloud-fan commented on a change in pull request #31145:
URL: https://github.com/apache/spark/pull/31145#discussion_r556367528
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/PushDownLeftSemiAntiJoin.scala
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@@ -52,9 +52,11 @@ object PushDownLeftSemiAntiJoin extends Rule[LogicalPlan]
with PredicateHelper {
}
// LeftSemi/LeftAnti over Aggregate
- case join @ Join(agg: Aggregate, rightOp, LeftSemiOrAnti(_), _, _)
- if agg.aggregateExpressions.forall(_.deterministic) &&
agg.groupingExpressions.nonEmpty &&
-
!agg.aggregateExpressions.exists(ScalarSubquery.hasCorrelatedScalarSubquery) =>
+ case join @ Join(agg @ Aggregate(groups, aggs, _), rightOp,
LeftSemiOrAnti(_), cond, _)
+ if aggs.forall(_.deterministic) && groups.nonEmpty &&
+ !aggs.exists(ScalarSubquery.hasCorrelatedScalarSubquery) &&
+ !(cond.nonEmpty && groups.equals(aggs) &&
+ cond.forall(e =>
splitConjunctivePredicates(e).forall(_.isInstanceOf[EqualNullSafe]))) =>
Review comment:
We can add a new method to `JoinSelectionHelper`
```
def canPlanAsBroadcastHashJoin(join: Join, conf: SQLConf): Boolean = {
getBroadcastBuildSide(join.left, join.right, join.joinType,
join.hint, hintOnly = true, conf).isDefined ||
getBroadcastBuildSide(join.left, join.right, join.joinType,
join.hint, hintOnly = false, conf).isDefined
}
```
and then use it here:
`if ... && canPlanAsBroadcastHashJoin(join, conf)`
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