dongjoon-hyun commented on issue #27233: [SPARK-29701][SQL] Correct behaviours of group analytical queries when empty input given URL: https://github.com/apache/spark/pull/27233#issuecomment-577490971 Hi, @maropu . Could you update the PR description by adding the DBMS comparison comments? @tgravescs 's comment is a good point and many people will ask that again.
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