NGA-TRAN commented on code in PR #18661:
URL: https://github.com/apache/datafusion/pull/18661#discussion_r2525638035
##########
datafusion/physical-optimizer/src/enforce_sorting/mod.rs:
##########
@@ -516,10 +516,7 @@ pub fn ensure_sorting(
);
child = update_sort_ctx_children_data(child, true)?;
}
- } else if physical_ordering.is_none()
- || !plan.maintains_input_order()[idx]
- || is_union(plan)
- {
+ } else if physical_ordering.is_none() ||
!plan.maintains_input_order()[idx] {
Review Comment:
Very nice analysis
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