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Date: Sun, 2 Jul 2017 05:25:01 +0000 (UTC)
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Subject: [jira] [Commented] (FLINK-6927) Support pattern group in CEP
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archived-at: Sun, 02 Jul 2017 05:25:07 -0000


    [ https://issues.apache.org/jira/browse/FLINK-6927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16071522#comment-16071522 ] 

ASF GitHub Bot commented on FLINK-6927:
---------------------------------------

Github user dianfu commented on a diff in the pull request:

    https://github.com/apache/flink/pull/4153#discussion_r125173871
  
    --- Diff: flink-libraries/flink-cep/src/main/java/org/apache/flink/cep/nfa/compiler/NFAStateNameHandler.java ---
    @@ -55,6 +55,11 @@ public void checkNameUniqueness(String name) {
     		if (usedNames.contains(name)) {
     			throw new MalformedPatternException("Duplicate pattern name: " + name + ". Names must be unique.");
     		}
    +		usedNames.add(name);
    +	}
    +
    --- End diff --
    
    updated


> Support pattern group in CEP
> ----------------------------
>
>                 Key: FLINK-6927
>                 URL: https://issues.apache.org/jira/browse/FLINK-6927
>             Project: Flink
>          Issue Type: Sub-task
>          Components: CEP
>            Reporter: Dian Fu
>            Assignee: Dian Fu
>
> We should add support for pattern group. This would enrich the set of supported patterns. For example, users can write patterns like this with this feature available:
> {code}
>  A --> (B --> C.times(3)).optional() --> D
> {code}
> or
> {code}
> A --> (B --> C).times(3) --> D
> {code}


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