Takuya Ueshin created SPARK-20668:
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Summary: 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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