vladimirg-db commented on code in PR #50548:
URL: https://github.com/apache/spark/pull/50548#discussion_r2054653700
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala:
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@@ -2309,6 +2316,27 @@ class Analyzer(override val catalogManager:
CatalogManager) extends RuleExecutor
* Note: CTEs are handled in CTESubstitution.
*/
object ResolveSubquery extends Rule[LogicalPlan] {
+
+ /**
+ * Returns the outer scope attributes referenced in the subquery
expressions
+ * in current plan and the children of the current plan.
+ */
+ private def getOuterAttrsNeedToBePropagated(plan: LogicalPlan):
Seq[Expression] = {
Review Comment:
We could return a pair from `getOuterReferences` (direct and indirect outer
attrs).
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