allisonwang-db commented on a change in pull request #32787:
URL: https://github.com/apache/spark/pull/32787#discussion_r658450441
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
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@@ -1571,6 +1582,26 @@ class Analyzer(override val catalogManager:
CatalogManager)
}
}
+ // Expand the star expression using the input plan first. If failed, try
resolve
+ // the star expression using the outer query plan and wrap the resolved
attributes
+ // in outer references. Otherwise throw the original exception.
+ private def expand(s: Star, plan: LogicalPlan): Seq[NamedExpression] = {
+ withPosition(s) {
+ try {
+ s.expand(plan, resolver)
+ } catch {
+ case e: AnalysisException =>
+ AnalysisContext.get.outerPlan.map(p =>
+ // Only a few unary nodes (Project/Aggregate) can host star
expressions.
+ Try(s.expand(p.children.head, resolver)) match {
Review comment:
Join can't host star expressions I think. Only star expressions in
Project and Aggregate are handled in the Analyzer.
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