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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:
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Assignee: 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
> Assignee: Apache Spark
>
> 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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