ajithme edited a comment on issue #24762: [SPARK-27907][SQL] HiveUDAF with 0 rows throw NPE URL: https://github.com/apache/spark/pull/24762#issuecomment-497855726 > Interesting, I wonder if the 'correct' answer should be the empty result set or null? @gatorsmile or @cloud-fan do you have insight into this one? I tried the same query on hive and it returned null, so i think we can keep it consistent with hive behaviour.? 
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