rmetzger commented on issue #7638: [FLINK-11510] [DataStream] Add the MultiFieldSumAggregator to support KeyedStream.sum(int[] positionToSums ) URL: https://github.com/apache/flink/pull/7638#issuecomment-463130233 Thanks a lot for your contribution! I've commented on the PR because the tracking comment by flinkbot was outdated. Before I can review the pull request, I would like to get approval from somebody more familiar with the Flink API whether we have consensus to actually add this feature (see also the contribution guide: https://flink.apache.org/contribute-code.html#before-you-start-coding) I've pinged Aljoscha in the JIRA ticket: https://issues.apache.org/jira/browse/FLINK-11510 Let's hope he soon confirms that the feature is a good fit.
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