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From "Dian Fu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4641) Support branching CEP patterns
Date Fri, 07 Jul 2017 05:35:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16077624#comment-16077624
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Dian Fu commented on FLINK-4641:
--------------------------------

Hi [~dawidwys], just think of one more use case:
for the above second example, pattern {noformat}a ( ( b c{1,} ) | d ) {2} e{noformat}
if the inputs are {{a, b1, c1, d1, c2, d2, e}}, what do you think the output should be? Will
it contain {{a b1 c1 c2 d2 e}} or {{a d1 d2 e}}?





> Support branching CEP patterns 
> -------------------------------
>
>                 Key: FLINK-4641
>                 URL: https://issues.apache.org/jira/browse/FLINK-4641
>             Project: Flink
>          Issue Type: Sub-task
>          Components: CEP
>            Reporter: Till Rohrmann
>            Assignee: Dian Fu
>
> We should add support for branching CEP patterns to the Pattern API. 
> {code}
>     |--> B --|
>     |        |
> A --         --> D
>     |        |
>     |--> C --|
> {code}
> This feature will require changes to the {{Pattern}} class and the {{NFACompiler}}.



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