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From KurtYoung <...@git.apache.org>
Subject [GitHub] flink pull request #4940: [FLINK-7959] [table] Split CodeGenerator into Code...
Date Fri, 03 Nov 2017 07:44:00 GMT
GitHub user KurtYoung opened a pull request:

    https://github.com/apache/flink/pull/4940

    [FLINK-7959] [table] Split CodeGenerator into CodeGeneratorContext and ExprCodeGenerator.

    
    ## What is the purpose of the change
    
    Split current `CodeGenerator` into two dedicated classes, `CodeGeneratorContext` and `ExprCodeGenerator`.
The `CodeGeneratorContext` is responsible for maintaining various reusable statements that
could be insert into the final generated class, while the `ExprCodeGenerator` is responsible
for generating codes for `RexNode` and generating result convertion codes.
    
    ## Brief change log
    
      - *Remove `CodeGenerator` and introduce `ExprCodeGenerator` and `CodeGeneratorContext`*
      - *Make some code generator static*
    
    ## Verifying this change
    
    *(Please pick either of the following options)*
    
    This change is already covered by existing tests.
    
    ## 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 )
    
    ## Documentation
    
      - Does this pull request introduce a new feature? (no)
    


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/KurtYoung/flink flink-7959

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/4940.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #4940
    
----
commit 77b2d0ac00671347b0952719d70e2eb8230cd8d4
Author: Kurt Young <ykt836@gmail.com>
Date:   2017-11-03T07:37:22Z

    [FLINK-7959] [table] Split CodeGenerator into CodeGeneratorContext and ExprCodeGenerator.

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