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https://issues.apache.org/jira/browse/FLINK-3320?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dawid Wysakowicz resolved FLINK-3320.
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Resolution: Fixed
> 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
> Assignee: Dawid Wysakowicz
> Priority: Critical
>
> 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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