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[SPARK-26078][SQL][BACKPORT-2.4] Dedup self-join attributes on IN subqueries #23449

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mgaido91 wants to merge 2 commits into from
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[SPARK-26078][SQL][BACKPORT-2.4] Dedup self-join attributes on IN subqueries #23449

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[SPARK-26078][SQL][BACKPORT-2.4] Dedup self-join attributes on IN sub…
mgaido91 Dec 16, 2018
f9d13e5
fix build
mgaido91 Jan 4, 2019
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fix build
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@mgaido91
mgaido91 committed Jan 4, 2019
commit f9d13e5e3da083e1f1b99f5b406da744f365a2d2
2 changes: 1 addition & 1 deletion sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/subquery.scala
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Expand Up @@ -68,7 +68,7 @@ object RewritePredicateSubquery extends Rule[LogicalPlan] with PredicateHelper {
// attributes in the join condition, the subquery's conflicting attributes are changed using
// a projection which aliases them and resolves the problem.
val outerReferences = valuesOpt.map(values =>
AttributeSet.fromAttributeSets(values.map(_.references))).getOrElse(AttributeSet.empty)
AttributeSet(values.flatMap(_.references))).getOrElse(AttributeSet.empty)
val outerRefs = outerPlan.outputSet ++ outerReferences
val duplicates = outerRefs.intersect(subplan.outputSet)
if (duplicates.nonEmpty) {
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