[jira] [Created] (FLINK-3320) Add not operator to CEP's pattern API

[Shang Yuanchun (Jira)]

Till Rohrmann created FLINK-3320:
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             Summary: Add not operator to CEP's pattern API
                 Key: FLINK-3320
                 URL: https://issues.apache.org/jira/browse/FLINK-3320
             Project: Flink
          Issue Type: Improvement
          Components: CEP
    Affects Versions: 1.0.0
            Reporter: Till Rohrmann
            Priority: Minor


Currently, CEP's pattern API is lacking a {{not}} operator which would you allow to define which events must not occur in a matched pattern. It would be beneficial to add this operator in order to increase the set of supported patterns.

{code}
Pattern.begin("start").where(...).followedBy("middle").notFollowedBy("not").where(...).notNext("not2").where(...)
{code}



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