ajithme commented on issue #24762: [SPARK-27907][SQL] HiveUDAF with 0 rows throw NPE when try to serialize URL: https://github.com/apache/spark/pull/24762#issuecomment-497833781 > I guess anything's better than an NPE. What's the result in this case? null will be returned ``` +------------------------+ |histogram_numeric( a, 2)| +------------------------+ | null| +------------------------+ ```
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