Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/1975#discussion_r83309671 --- Diff: flink-streaming-scala/src/main/scala/org/apache/flink/streaming/api/scala/AllWindowedStream.scala --- @@ -361,38 +361,84 @@ class AllWindowedStream[T, W <: Window](javaStream: JavaAllWStream[T, W]) { /** * Applies an aggregation that that gives the maximum element of the window by - * the given position. When equality, returns the first. + * the given position. When equality, returns the first by default. */ def maxBy(position: Int): DataStream[T] = aggregate(AggregationType.MAXBY, - position) + position, true) /** * Applies an aggregation that that gives the maximum element of the window by - * the given field. When equality, returns the first. + * the given position. When equality, returns either the first or last one depending + * on the parameter setting. + */ + def maxBy(position: Int, first: Boolean): DataStream[T] = aggregate(AggregationType.MAXBY, --- End diff -- Please annotate all new public methods with `@PublicEvolving`.
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