dianfu commented on issue #11009: [Flink-15873] [cep] fix matches result not returned when existing earlier partial matches URL: https://github.com/apache/flink/pull/11009#issuecomment-586883222 I think we have to do so is because retraction isn't supported in CEP. For example, if the matched results are emit when there are partial matches which are early than the matched result and the partial matches match succeeded in the future, the emitted results may should be refined. However, as retraction is not supported, there is no way to refine the results and so we have to hold the matched results in this case.
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