[GitHub] [flink] WeiZhong94 opened a new pull request #8267: [FLINK-12311][table][python] Add base python framework and Add Scan, Projection, and Filter operator support

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

WeiZhong94 opened a new pull request #8267: [FLINK-12311][table][python] Add base python framework and Add Scan, Projection, and Filter operator support
URL: https://github.com/apache/flink/pull/8267
 
 
   
   ## What is the purpose of the change
   
   *This pull request adds the basic functionalities for Python Table API. Only Scan, Projection, and Filter operator will be supported in this PR.*
   
   
   ## Brief change log
   
     - *Add a `flink-python` module with a submodule `flink-python-table` under flink-parent.*
     - *Add `pyflink2.sh` on `flink-dist` module for launching Py4J Java Gateway Server.*
     - *Add a minimal implementation of the Flink Python Table API that only support Scan, Projection, and Filter operator.*
     - *Add documents for Scan, Projection, and Filter operator of the Python Table API.*
     - *Add a simple end to end test for Python Table API.*
   
   
   ## Verifying this change
   
   This change added tests and can be verified as follows:
   
     - *Manually verified the change by building the whole project using `mvn clean package`, entering the directory `$FLINK_HOME/flink-python/flink-python-table/src/main/python`, and running `PYTHONPATH=./ python ./pyflink/table/tests/test_end_to_end.py`, verifying the program runs correctly and no exception raised.*
   
   ## Does this pull request potentially affect one of the following parts:
   
     - Dependencies (does it add or upgrade a dependency): (yes)
     - 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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