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Posted to issues@flink.apache.org by "Dian Fu (Jira)" <ji...@apache.org> on 2023/02/07 02:21:00 UTC

[jira] [Assigned] (FLINK-30864) Optional pattern at the start of a group pattern not working

     [ https://issues.apache.org/jira/browse/FLINK-30864?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dian Fu reassigned FLINK-30864:
-------------------------------

    Assignee: Juntao Hu

> Optional pattern at the start of a group pattern not working
> ------------------------------------------------------------
>
>                 Key: FLINK-30864
>                 URL: https://issues.apache.org/jira/browse/FLINK-30864
>             Project: Flink
>          Issue Type: Bug
>          Components: Library / CEP
>    Affects Versions: 1.16.1
>            Reporter: Juntao Hu
>            Assignee: Juntao Hu
>            Priority: Major
>              Labels: pull-request-available
>
> The optional pattern at the start of a group pattern turns out be "not optional", e.g.
> {code:java}
> Pattern.<String>begin("A").next(Pattern.<String>begin("B").optional().next("C")).next("D")
> {code}
> cannot match sequence "a1 c1 d1".



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