beliefer edited a comment on issue #26420: [SPARK-27986][SQL] Support ANSI SQL filter predicate for aggregate expression. URL: https://github.com/apache/spark/pull/26420#issuecomment-552200215 @maropu This is a good idea. As cloud-fan said how to treat `count`. In addition to `count`, there are other situations here. Such as: `percentile`, `percentile_approx`, `approx_count_distinct` and so on. We can't only treat as `null`.
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