Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/3470#discussion_r104297207 --- 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 -- Can we implement `LongAvgAggFunction` without the indirection via `BigIntegralAvgAggFunction`? `BigIntegralAvgAggFunction` is no used anywhere else.
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