[jira] [Updated] (FLINK-20474) flink cep results of doc is not right

["Yun Gao (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-20474?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yun Gao updated FLINK-20474:
----------------------------
    Fix Version/s: 1.16.0

> flink cep results of doc is not right
> -------------------------------------
>
>                 Key: FLINK-20474
>                 URL: https://issues.apache.org/jira/browse/FLINK-20474
>             Project: Flink
>          Issue Type: Bug
>          Components: Library / CEP
>    Affects Versions: 1.12.0
>            Reporter: jackylau
>            Priority: Minor
>              Labels: auto-deprioritized-major, pull-request-available
>             Fix For: 1.15.0, 1.16.0
>
>
> h4. Contiguity within looping patterns
> You can apply the same contiguity condition as discussed in the previous [section|https://ci.apache.org/projects/flink/flink-docs-release-1.12/dev/libs/cep.html#combining-patterns] within a looping pattern. The contiguity will be applied between elements accepted into such a pattern. To illustrate the above with an example, a pattern sequence {{"a b+ c"}} ({{"a"}} followed by any(non-deterministic relaxed) sequence of one or more {{"b"}}’s followed by a {{"c"}}) with input {{"a", "b1", "d1", "b2", "d2", "b3" "c"}} will have the following results:
>  # *Strict Contiguity*: {{{a b3 c}}} – the {{"d1"}} after {{"b1"}} causes {{"b1"}} to be discarded, the same happens for {{"b2"}} because of {{"d2"}}.
>  # *Relaxed Contiguity*: {{{a b1 c}}}, {{{a b1 b2 c}}}, {{{a b1 b2 b3 c}}}, {{{a b2 c}}}, {{{a b2 b3 c}}}, {{{a b3 c}}} - {{"d"}}’s are ignored.
>  # *Non-Deterministic Relaxed Contiguity*: {{{a b1 c}}}, {{{a b1 b2 c}}}, {{{a b1 b3 c}}}, {{{a b1 b2 b3 c}}}, {{{a b2 c}}}, {{{a b2 b3 c}}}, {{{a b3 c}}} - notice the {{{a b1 b3 c}}}, which is the result of relaxing contiguity between {{"b"}}’s.
>  
>  {{"a b+ c"}} ({{"a"}} followed by any(non-deterministic relaxed) sequence of one or more {{"b"}}’s followed by a {{"c"}}) is not correct at *followed by a {{"c". it is nexted by a "c"}}*



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