Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/22029 @mgaido91, mind if I ask add few notes about https://github.com/apache/spark/pull/22029#issuecomment-411473227? For instance, which DBMS follows the current change. And sounds the previous behaviour is closer to Hive but Hive's behaviour is not quite coherent? It sounds reasonable to me.
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