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From dawidwys <...@git.apache.org>
Subject [GitHub] flink issue #4153: [FLINK-6927] [cep] Support pattern group in CEP
Date Thu, 29 Jun 2017 08:41:49 GMT
Github user dawidwys commented on the issue:

    @dianfu sorry I have not reviewed it yet, but I do think this feature would benefit from
reworking of the Pattern API I propose in [FLINK-3414](https://issues.apache.org/jira/browse/FLINK-3414).
    Instead of checking for head/tail of group pattern and caching them, we could more or
less use current code for plain sequence creation that could return begin/end states. Then
the code for joining groups would be much easier, cause it would operate on already translated
    Also the new API would make [FLINK-4641]](https://issues.apache.org/jira/browse/FLINK-4641)
    much easier I think.
    As it would require API rework I would really like to hear @kl0u opinion. If we agree
though not to change the API I will go straight to reviewing this PR.

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