Github user fhueske commented on the pull request: https://github.com/apache/flink/pull/1981#issuecomment-218481504 Thanks for this PR, @dawidwys! I haven't had a look yet but will do soon. Just a quick comment: this PR touches some files that PR #1958 is also modifying (mostly on the API level, not the runtime and optimization code). PR #1958 is a bigger change but in good shape and should be mergable soon. I would like to merge #1958 before this one, so you will need to rebase once this has happened. That should not be too much work, just wanted to let you know in advance. Thanks, Fabian
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