ASF GitHub Bot commented on FLINK-6938:

Github user dianfu commented on the issue:

    As discussed with @wuchong offline, I will continue the work of #4145 as 
this is required by the feature of cep on sql, see the PR of FLINK-7062 for 
    @dawidwys @kl0u Could you help to review? Actually, I just rebased the code 
of #4145 and addressed the comments there. Most of the fixes refer the test 
branch https://github.com/kl0u/flink/tree/cep-iter-pr by @kl0u. I have not 
removed IterativeCondition as I think it breaks the backward compatibility.

> IterativeCondition should support RichFunction interface
> --------------------------------------------------------
>                 Key: FLINK-6938
>                 URL: https://issues.apache.org/jira/browse/FLINK-6938
>             Project: Flink
>          Issue Type: Sub-task
>          Components: CEP
>            Reporter: Jark Wu
>            Assignee: Jark Wu
>             Fix For: 1.4.0
> In FLIP-20, we need IterativeCondition to support an {{open()}} method to 
> compile the generated code once. We do not want to insert a if condition  in 
> the {{filter()}} method. So I suggest make IterativeCondition support 
> {{RichFunction}} interface.

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