[GitHub] dawidwys opened a new pull request #7440: [FLINK-10591][table] Introduced functions to return time attributes from MATCH_RECOGNIZE

[GitBox <gi...@apache.org>]

dawidwys opened a new pull request #7440:  [FLINK-10591][table] Introduced functions to return time attributes from MATCH_RECOGNIZE
URL: https://github.com/apache/flink/pull/7440
 
 
   ## What is the purpose of the change
   
   This PR introduces sql functions that allow extracting time attributes from `MATCH_RECOGNIZE` clause. It introduces `MATCH_ROWTIME` and `MATCH_PROCTIME` functions. It also switches to newly introduced in cep library `PatternProcessFunction`. This function provides more fine grained access to contextual information and provides rich interface as well.
   
   ## Brief change log
   
   - 57becad - switches from `PatternSelectFunction` to `PatternProcessFunction`
   - 73dc8d6 - adds support for `MATCH_ROWTIME` and `MATCH_PROCTIME`
   - 5444f2d - describes the functions in documentation
   
   
   ## Verifying this change
   
   It adds tests in `MatchRecognizeITCase`
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): **no**
     - The public API, i.e., is any changed class annotated with `@Public(Evolving)`: **no**
     - The serializers: **no**
     - The runtime per-record code paths (performance sensitive): **no**
     - Anything that affects deployment or recovery: JobManager (and its components), Checkpointing, Yarn/Mesos, ZooKeeper: **no**
     - The S3 file system connector: **no**
   
   ## Documentation
   
     - Does this pull request introduce a new feature? **yes**
     - If yes, how is the feature documented? **docs**
   

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