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From fhueske <...@git.apache.org>
Subject [GitHub] flink pull request #3470: [FLINK-5956] [table] Add retract method for aggreg...
Date Sat, 04 Mar 2017 22:29:21 GMT
Github user fhueske commented on a diff in the pull request:

    --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/AggregateFunction.scala
    @@ -35,6 +36,18 @@ abstract class AggregateFunction[T] extends UserDefinedFunction {
       def createAccumulator(): Accumulator
    +    * Retract the input values from the accumulator instance.
    --- End diff --
    Do we want to mention that only previously `accumulated` values need to be `retracted`?
    Users should not check for that but can use this assumption to implement more efficient

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