RAPIDS accelerated Spark Scala UDF support #1636
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Signed-off-by: Jason Lowe <jlowe@nvidia.com>
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Signed-off-by: Jason Lowe <jlowe@nvidia.com>
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Signed-off-by: Jason Lowe <jlowe@nvidia.com>
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Closes #1594.
This implements a GPU version of
ScalaUDFwhich is used to track Spark Scala UDFs. Note that this class is also used for Java UDFs which are NOT supported by this change due to the obscuring of the user's class by a lambda wrapper for that case. Adding support for Spark Java UDFs is tracked by #1635.A working example of a RAPIDS accelerated Spark Scala UDF is also provided, which required adding the Scala version to the udf-examples jar (and everywhere it was referenced). A unit test was added to exercise it. It was not implemented as a Python test as was done for the Hive UDFs because PySpark does not support registering Scala UDFs (it uses the Java UDF interface instead).
The RAPIDS accelerated UDF documentation has also been updated to reflect the new functionality.