Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/4355#discussion_r135539685
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/aggregate/AggregateUtil.scala
---
@@ -249,7 +258,8 @@ object AggregateUtil {
outputArity,
needRetract,
needMerge = false,
- needReset = true
+ needReset = true,
--- End diff --
`needReset` can be `false`.
`resetAccumulator()` is not called by the any of the window operators. Not
sure why this was `true` before...
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