Github user shaoxuan-wang commented on a diff in the pull request:
https://github.com/apache/flink/pull/3470#discussion_r104304129
--- 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 --
If I directly create a LongAvgAggFunction, it will be difficult to return
null for avg result, as null.asInstanceOf[Long] will return 0.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
