fred-db commented on code in PR #38497:
URL: https://github.com/apache/spark/pull/38497#discussion_r1019245404
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/subquery.scala:
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@@ -148,7 +150,7 @@ object RewritePredicateSubquery extends Rule[LogicalPlan]
with PredicateHelper {
// will have the final conditions in the LEFT ANTI as
// (A.A1 = B.B1 OR ISNULL(A.A1 = B.B1)) AND (B.B2 = A.A2) AND B.B3 >
1
val finalJoinCond = (nullAwareJoinConds ++
conditions).reduceLeft(And)
- Join(outerPlan, newSub, LeftAnti, Option(finalJoinCond),
JoinHint.NONE)
+ Join(outerPlan, newSub, LeftAnti, Option(finalJoinCond),
JoinHint(None, subHint))
Review Comment:
Not sure how useful this is, as from the code it is more or less apparent
where the subquery hint goes; if the subquery goes on the right side, then the
hint goes on the right side too.
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