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Update examples/UDF-Examples/RAPIDS-accelerated-UDFs/README.md
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Co-authored-by: Jason Lowe <jlowe@nvidia.com>
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nvliyuan and jlowe authored Sep 26, 2023
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This project contains sample implementations of RAPIDS accelerated user-defined functions.

The ideal solution would be to replace the UDF with a series of DataFrame or SQL operations. If that is not possible, we also provide a [UDF compiler extension](https://nvidia.github.io/spark-rapids/docs/additional-functionality/udf-to-catalyst-expressions.html)
to translate UDFs to Catalyst expressions. The extension is limited to only support compiling simple operations, For complitcated cases, you can choose to implement
a RAPIDS Accelerated UDF.
to translate UDFs to Catalyst expressions. The extension is limited to only support compiling simple operations.
For complicated cases, you can choose to implement a RAPIDS Accelerated UDF.

## Spark Scala UDF Examples
This is the best and simplest demo for us to getting started. From the code you can see there is an original CPU implementation
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