I have noticed that, in the spark sql query physical plan, there are two types of aggregations. I wanna know the difference between "hashAggregation" and "tungstenAggregation". I have shown, two types of physical plan for reference. Thanks!
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You forgot to add the plan. On GitHub you can some information in the [sourcecode](https://github.com/apache/spark/tree/master/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate) – Jeroen Heier Jun 18 '18 at 03:45
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https://stackoverflow.com/questions/37505638/understanding-spark-physical-plan – thebluephantom Jun 27 '18 at 17:23