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https://issues.apache.org/jira/browse/SPARK-11716?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15018702#comment-15018702
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Apache Spark commented on SPARK-11716:
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User 'yhuai' has created a pull request for this issue:
https://github.com/apache/spark/pull/9868
> UDFRegistration Drops Input Type Information
> --------------------------------------------
>
> Key: SPARK-11716
> URL: https://issues.apache.org/jira/browse/SPARK-11716
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 1.5.1
> Reporter: Artjom Metro
> Labels: sql, udf
>
> The UserDefinedFunction returned by the UDFRegistration does not contain the
> input type information, although that information is available.
> To fix the issue the last line of every register function would had to be
> changed to "UserDefinedFunction(func, dataType, inputType)" or is there any
> specific reason this was not done?
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