gene-bordegaray commented on code in PR #18521:
URL: https://github.com/apache/datafusion/pull/18521#discussion_r2510882854
##########
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:
I think this is good, this will let me link the docs after I finish
including the last bit of logic I stopped at and can update this comment
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