gene-bordegaray commented on code in PR #18521:
URL: https://github.com/apache/datafusion/pull/18521#discussion_r2506956522
##########
datafusion/physical-optimizer/src/enforce_distribution.rs:
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@@ -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:
if we link these I would like to finish the docs to be complete. If you
notice I cut off at the end of the explanation of the enforce_distribution
because this was thorough enough for this bug
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