AveryQi115 commented on code in PR #50548:
URL: https://github.com/apache/spark/pull/50548#discussion_r2054649412
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala:
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@@ -2320,20 +2348,57 @@ class Analyzer(override val catalogManager:
CatalogManager) extends RuleExecutor
e: SubqueryExpression,
outer: LogicalPlan)(
f: (LogicalPlan, Seq[Expression]) => SubqueryExpression):
SubqueryExpression = {
- val newSubqueryPlan = AnalysisContext.withOuterPlan(outer) {
- executeSameContext(e.plan)
+ val outerPlanContext = AnalysisContext.get.outerPlans
+ val newSubqueryPlan = if (outerPlanContext.isDefined &&
+ // We don't allow lateral subquery having nested correlation
+ !e.isInstanceOf[LateralSubquery]
Review Comment:
PostgreSQL and duckDB supports special outerScopeAttrs as long as the
outerScopeAttrs and the LateralSubquery has clear quantifier and alias.
We can do this later, but for now, we'll just disallow nested correlations
in LateralSubquery.
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