GitHub user ueshin opened a pull request:
https://github.com/apache/spark/pull/20307
[SPARK-23141][SQL][PYSPARK] Support data type string as a returnType for
registerJavaFunction.
## What changes were proposed in this pull request?
Currently `UDFRegistration.registerJavaFunction` doesn't support data type
string as a `returnType` whereas `UDFRegistration.register`, `@udf`, or
`@pandas_udf` does.
We can support it for `UDFRegistration.registerJavaFunction` as well.
## How was this patch tested?
Added a doctest and existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ueshin/apache-spark issues/SPARK-23141
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/20307.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 #20307
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commit 1a2c01d84315e8937f0683680dd81dec5a4a3a6f
Author: Takuya UESHIN <ueshin@...>
Date: 2018-01-18T06:04:30Z
Support data type string as a returnType for registerJavaFunction.
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