Github user shaoxuan-wang commented on a diff in the pull request:
https://github.com/apache/flink/pull/3470#discussion_r104301022
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/aggfunctions/AvgAggFunction.scala
---
@@ -137,6 +146,15 @@ abstract class BigIntegralAvgAggFunction[T] extends
AggregateFunction[T] {
}
}
+ override def retract(accumulator: Accumulator, value: Any): Unit = {
--- End diff --
I assume you are suggesting implement LongAvgAggFunction directly with
JTuple2[BigInteger, Long] as the accumulator, then yes, we could do that.
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