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ASF GitHub Bot commented on FLINK-5630: --------------------------------------- Github user aljoscha commented on a diff in the pull request: https://github.com/apache/flink/pull/3207#discussion_r97776155 --- Diff: flink-streaming-java/src/main/java/org/apache/flink/streaming/api/datastream/WindowedStream.java --- @@ -515,12 +515,16 @@ public WindowedStream(KeyedStream<T, K> input, // ------------------------------------------------------------------------ /** - * Applies the given fold function to each window. The window function is called for each - * evaluation of the window for each key individually. The output of the reduce function is - * interpreted as a regular non-windowed stream. + * Applies the given aggregation function to each window. The aggregation function is called for + * each element, aggregating values incrementally and keeping the state to one accumulator + * per key and window. * * @param function The fold function. --- End diff -- Pre-existing typo: "fold function". > Followups to AggregationFunction > -------------------------------- > > Key: FLINK-5630 > URL: https://issues.apache.org/jira/browse/FLINK-5630 > Project: Flink > Issue Type: Improvement > Components: Streaming > Affects Versions: 1.3.0 > Reporter: Stephan Ewen > Assignee: Stephan Ewen > Fix For: 1.3.0 > > > Various followup issues to the aggregation function, like > - Allowing different input/output types for the cases where an additional > window apply function is specified > - Adding the {{aggregate()}} methods to the Scala API > - Adding the window translation tests -- This message was sent by Atlassian JIRA (v6.3.4#6332)