peter-toth commented on code in PR #10543:
URL: https://github.com/apache/datafusion/pull/10543#discussion_r1614657172


##########
datafusion/physical-plan/src/work_table.rs:
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@@ -169,7 +169,7 @@ impl ExecutionPlan for WorkTableExec {
         &self.cache
     }
 
-    fn children(&self) -> Vec<Arc<dyn ExecutionPlan>> {
+    fn children(&self) -> Vec<&Arc<dyn ExecutionPlan>> {

Review Comment:
   I opened a PR as returning a slice in `ConcreteTreeNode` is possible: 
https://github.com/apache/datafusion/pull/10666
   But it will not work for `LogicalPlan` or `ExecutionPlan` or `PhysicalExpr`.



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