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https://issues.apache.org/jira/browse/SPARK-20668?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-20668:
------------------------------------

    Assignee:     (was: Apache Spark)

> Modify ScalaUDF to handle nullability.
> --------------------------------------
>
>                 Key: SPARK-20668
>                 URL: https://issues.apache.org/jira/browse/SPARK-20668
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 2.3.0
>            Reporter: Takuya Ueshin
>
> When registering Scala UDF, we can know if the udf will return nullable value 
> or not. {{ScalaUDF}} and related classes should handle the nullability.



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