Github user stefanobortoli commented on the issue:
https://github.com/apache/flink/pull/3771
@fhueske @rtudoran @shijinkui @sunjincheng121 I have create a new PR for
distinct in the code generator. Please have a look and let me know. I have
implemented and tested only for OverProcTimeRowBounded window, but if you like
it I can quickly implement and test also the others.
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