Github user hvanhovell commented on the issue: https://github.com/apache/spark/pull/13802 I think we should rename and document `supportsPartial` to reflect what it actually does. `Rank` and `RowNumer` are window functions. They both rely on ordered evaluation, and they should never be evaluated in any `*AggregateExec` operator. We have a rule to prevent this in the analyzer.
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