maropu commented on a change in pull request #29585:
URL: https://github.com/apache/spark/pull/29585#discussion_r484886465
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala
##########
@@ -203,3 +203,58 @@ abstract class BinaryNode extends LogicalPlan {
abstract class OrderPreservingUnaryNode extends UnaryNode {
override final def outputOrdering: Seq[SortOrder] = child.outputOrdering
}
+
+object LogicalPlanIntegrity {
+
+ private def canGetOutputAttrs(p: LogicalPlan): Boolean = {
+ p.resolved && !p.expressions.exists { e =>
+ e.collectFirst {
+ // We cannot call `output` in plans with a `ScalarSubquery` expr
having no column,
+ // so, we filter out them in advance.
Review comment:
Some existing tests failed with the assertion below;
https://github.com/apache/spark/blob/e7d9a245656655e7bb1df3e04df30eb3cc9e23ad/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/subquery.scala#L229
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