Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/2811
Thanks for the pull request @AlexanderShoshin! The overall approach is
good. We need to fix a few things in the optimizer rule and I would like to use
a `Map` instead of a `Cross` to execute the `DataSetSingleRowCross`. `Map` is
much more lightweight than `Cross`.
Thanks, Fabian
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