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Currently pyspark can only call the builtin java UDF, but can not call custom java UDF. It would be better to allow that. 2 benefits: * Leverage the power of rich third party java library * Improve the performance. Because if we use python UDF, python daemons will be started on worker which will affect the performance. Author: Jeff Zhang <zjffdu@apache.org> Closes #9766 from zjffdu/SPARK-11775. |
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