Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/3743
Hi @sunjincheng121,
thanks for the update! I was working on some refactoring of this PR as well
to get the validation logic clean, but I think your approach is much nicer.
I'll will rebase my changes on top of yours and will open a PR against your
PR branch soon.
Cheers, Fabian
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