cloud-fan commented on issue #26420: [SPARK-27986][SQL] Support ANSI SQL filter predicate for aggregate expression. URL: https://github.com/apache/spark/pull/26420#issuecomment-551794254 This is a nice feature! I'd like to know how it's implemented. Seems like we can't transform it into another logical form that we support, and we need to adjust our backend engine.
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