Github user jkovacs commented on the pull request:
https://github.com/apache/flink/pull/1138#issuecomment-144997953
Thanks @fhueske and @StephanEwen for the comprehensive review and
additional details on Flink internals!, I agree that we should rather wait to
implement the projection join correctly at a later point.
I'll append a few commits addressing the review comments and squash them
later into the appropriate commits when you feel it's ready to merge.
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