vladimirg-db commented on code in PR #49271:
URL: https://github.com/apache/spark/pull/49271#discussion_r1895806805
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/resolver/ExpressionResolver.scala:
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@@ -118,15 +120,17 @@ class ExpressionResolver(
* In this case `IN` is an expression and `SELECT 1` is a nested operator
tree for which
* the [[ExpressionResolver]] would invoke the [[Resolver]].
*/
- override def resolve(unresolvedExpression: Expression): Expression =
+ override def resolve(unresolvedExpression: Expression): Expression = {
+ planLogger.logExpressionTreeResolutionEvent(unresolvedExpression,
"Unresolved expression tree")
Review Comment:
It's recursive. But it's good that we log this for each node downwards,
since this way we will see the resolution order better (for expressions with
multiple children).
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