Github user fhueske commented on the issue:
https://github.com/apache/flink/pull/3564
Hi @hequn8128, thanks for the PR. I think it looks good, but I have a
question.
This PR is prepares for adding retractions. Why do we need a decoration
phase for batch queries if this is about retractions which only apply for
streams?
Thanks, Fabian
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