Github user twalthr commented on the issue: https://github.com/apache/flink/pull/6264 Thanks for the in-depth review @pnowojski. I hope I could address most of your comments. Since this PR heavily overlaps with #6201 and that PR needs a review and some additional work as well. I will close this PR for now and open a PR with a clean unified table sources/sinks/formats story. We can continue the discussions here and I will make sure that changes will be applied to new PR as well.