adriangb commented on code in PR #18521:
URL: https://github.com/apache/datafusion/pull/18521#discussion_r2505769532
##########
datafusion/physical-optimizer/src/enforce_distribution.rs:
##########
@@ -1273,7 +1273,7 @@ pub fn ensure_distribution(
child = add_merge_on_top(child);
}
Distribution::HashPartitioned(exprs) => {
- if add_roundrobin {
+ if add_roundrobin && !hash_necessary {
Review Comment:
Could we permalink to these in the code?
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