erikerlandson commented on issue #25024: [SPARK-27296][SQL] User Defined Aggregators that do not ser/de on each input row URL: https://github.com/apache/spark/pull/25024#issuecomment-543318918 @cloud-fan @hvanhovell @rdblue a UDF wrapper around Aggregator looks good. I pushed the code so you can see what it looks like. I will be re-writing my unit tests to use this version of the solution.
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