askalt commented on code in PR #19792:
URL: https://github.com/apache/datafusion/pull/19792#discussion_r2694102346
##########
datafusion/physical-plan/src/projection.rs:
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@@ -277,8 +288,9 @@ impl ExecutionPlan for ProjectionExec {
self: Arc<Self>,
mut children: Vec<Arc<dyn ExecutionPlan>>,
) -> Result<Arc<dyn ExecutionPlan>> {
+ check_if_same_properties!(self, children);
Review Comment:
Fast-path is implemented for most plans. It seems quite odd to me that we
need to ensure it's implemented for every plan (if at least one plan doesn't
implement this check and recalculates its properties, then recalculation will
be performed for all parent plans). I've reduced the required code as much as
possible: a plan implementer needs to call the added macro and implement the
`with_new_children_and_same_properties(...)` method for the plan.
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