sweb commented on code in PR #23989:
URL: https://github.com/apache/datafusion/pull/23989#discussion_r3707109094


##########
docs/source/library-user-guide/upgrading/55.0.0.md:
##########
@@ -774,6 +779,13 @@ Convenience methods such as 
`SessionContext::create_physical_expr` and
   parameter and forward it.
 - Code that read or wrote `execution_props.subquery_indexes` /
   `execution_props.subquery_results`: build a `PhysicalPlanningContext` 
instead.
+- Code that read `execution_props.lambda_variable_qualifier` or called
+  `ExecutionProps::with_qualified_lambda_variables`: nothing to migrate.
+  `create_physical_expr` populates the lambda qualifiers itself as it descends
+  into lambda bodies, so callers planning a `HigherOrderFunction` do not need 
to
+  do anything. The equivalent state now lives on `PhysicalPlanningContext`,
+  reachable via `PhysicalPlanningContext::lambda_variable_qualifier` and
+  `PhysicalPlanningContext::with_qualified_lambda_variables`.

Review Comment:
   addressed in 
https://github.com/apache/datafusion/pull/23989/changes/678073fb382e9ce126b81c8d9ab240530248c47c



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