maropu commented on issue #25830: [SPARK-29140][SQL] Handle parameters having "array" of javaType properly in HashAggregateExec URL: https://github.com/apache/spark/pull/25830#issuecomment-532905291 btw, `agg_expr_1_1` is not used inside the aggregation function. Actually, in `HashAggregateExec`, aggregation functions can only process fixed-length typed data and decimal values? https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/HashAggregateExec.scala#L1126 If so, I think we should filter out these complex types from the arguments of aggregate functions.
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