GitHub user twalthr opened a pull request:
https://github.com/apache/flink/pull/1595
[FLINK-3226] Implement a CodeGenerator for an efficient translation to
DataSet programs
This PR implements a CodeGenerator for Table API on Calcite.
It includes the following:
- FilterITCase, SelectITCase and ExpressionITCase are mostly working again
- Null values are now fully supported and tested with new
`TableProgramsTestBase`
- Arithmetic `+-*/ +X -X`, logical operators `== != AND, OR, NOT, IS NULL,
NOT NULL` are supported.
- Logical operators implement 3-valued logic.
- A new configuration parameter `efficientTypeUsage` allows generated
DataSet programs to be as efficient as ordinary DataSet programs by avoiding
unnecessary type conversions and using most efficient type for every operator.
Limitations:
- String functions are not yet supported. They will be forwarded to
Calcites runtime functions once I have implemented the necessary interfaces for
that.
- Expression type casting is missing yet
- Date Literal is not supported yet
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/twalthr/flink CodeGen
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/1595.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 #1595
----
commit c1a63287de0014f0b5bd23d1e0bc31e679f02fbe
Author: twalthr <[email protected]>
Date: 2016-02-05T16:40:54Z
[FLINK-3226] Implement a CodeGenerator for an efficient translation to
DataSet programs
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