GitHub user piaozhexiu opened a pull request:
https://github.com/apache/spark/pull/7203
[SPARK-8572] [SQL] Type coercion for ScalaUDFs
Implemented type coercion for udf arguments in Scala. The changes include-
* Add `with ExpectsInputTypes ` to `ScalaUDF` class.
* Pass down argument types info from `UDFRegistration` and `functions`.
With this patch, the example query in
[SPARK-8572](https://issues.apache.org/jira/browse/SPARK-8572) no longer throws
a type cast error at runtime.
Also added a unit test to `UDFSuite` in which a decimal type is passed to a
udf that expects an int.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/piaozhexiu/spark SPARK-8572
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/7203.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 #7203
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commit 066deed940c958ba55ff7dee2d36578a3ea0b8f0
Author: Cheolsoo Park <[email protected]>
Date: 2015-07-03T00:24:00Z
Type coercion for udf inputs
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