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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-7147) Support greedy quantifier in CEP
Date Thu, 03 Aug 2017 13:30:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-7147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16112698#comment-16112698
] 

ASF GitHub Bot commented on FLINK-7147:
---------------------------------------

Github user dawidwys commented on the issue:

    https://github.com/apache/flink/pull/4296
  
    I think we are getting close to the final version. Good job! Still though have two higher
level comments:
    
    - is current times().greedy() behaviour intended? For pattern `a{2, 5} b` and sequence
`a1 a2 a3 a4 b` shouldn't it return just one match: `a1 a2 a3 a4 b` Instead of three as in
`testGreedyTimesRange`
    - this feature should be documented in the docs. It should be also very clearly stated
there that it does not work for `GroupPatterns`
    
    



> Support greedy quantifier in CEP
> --------------------------------
>
>                 Key: FLINK-7147
>                 URL: https://issues.apache.org/jira/browse/FLINK-7147
>             Project: Flink
>          Issue Type: Sub-task
>          Components: CEP, Table API & SQL
>            Reporter: Dian Fu
>            Assignee: Dian Fu
>
> Greedy quantifier will try to match the token as many times as possible. For example,
for pattern {{a b* c}} (skip till next is used) and inputs {{a b1 b2 c}}, if the quantifier
for {{b}} is greedy, it will only output {{a b1 b2 c}}.



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