GitHub user xueyumusic opened a pull request:
https://github.com/apache/flink/pull/6337
[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.
Syntax:
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:
*(example:)*
- *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:
https://github.com/apache/flink/pull/6337.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 #6337
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commit 8d3bef913bee1d4913ef3ae056e3d15d4cda2cec
Author: xueyu <278006819@...>
Date: 2018-07-15T12:01:15Z
hex support
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