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From xueyumusic <...@git.apache.org>
Subject [GitHub] flink pull request #6337: [FLINK-9853][Tabel API & SQL] add HEX support
Date Sun, 15 Jul 2018 13:33:20 GMT
GitHub user xueyumusic opened a pull request:


    [FLINK-9853][Tabel API & SQL] add HEX support 

    ## What is the purpose of the change
    This PR propose to add HEX in table api and sql, the syntax like mysql, which could take
int or string arguments. For a integer argument N, it returns a hexadecimal string representation
of the value of N. For a string argument str, it returns a hexadecimal string representation
of str where each byte of each character in str is converted to two hexadecimal digits. 
    HEX(100) = 64
    HEX('This is a test String.') = '546869732069732061207465737420537472696e672e'
    ## Brief change log
      - *The expressionDsl, scalarSqlFunctions and mathExpressions to add hex*
      - *The FunctionGenerator to support hex generator*
    ## Verifying this change
    This change added tests and can be verified as follows:
      - *Added ScalaFunctionTests tests for table api and sql expressions*
    ## 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)

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

    $ git pull https://github.com/xueyumusic/flink hex

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


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

    This closes #6337
commit 8d3bef913bee1d4913ef3ae056e3d15d4cda2cec
Author: xueyu <278006819@...>
Date:   2018-07-15T12:01:15Z

    hex support



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