alamb commented on code in PR #3855:
URL: https://github.com/apache/arrow-datafusion/pull/3855#discussion_r999717922
##########
datafusion/core/src/physical_optimizer/utils.rs:
##########
@@ -45,3 +45,74 @@ pub fn optimize_children(
with_new_children_if_necessary(plan, children)
}
}
+
+/// Apply transform `F` to the plan's children, the transform `F` might have a
direction(Preorder or Postorder)
+fn map_children<F>(
Review Comment:
Ah, I missed the subtlety that they were for (slightly) different classes. 🤔
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