[SPARK-11716] [SQL] UDFRegistration just drops the input type when re-creating the UserDefinedFunction#9868

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yhuai wants to merge 3 commits intoapache:masterfrom

yhuai:SPARK-11716

Commits on Nov 18, 2015

SPARK-11716 - UDFRegistration just drops the input type when re-creating the UserDefinedFunction
jbonofre
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SPARK-11716 - Update the script used to generate register() functions
jbonofre
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Commits on Nov 20, 2015

Add a test
yhuai
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