Kevin Cox created SPARK-11321:
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Summary: Allow addition of non-nullable UDFs
Key: SPARK-11321
URL: https://issues.apache.org/jira/browse/SPARK-11321
Project: Spark
Issue Type: Improvement
Components: PySpark, SQL
Reporter: Kevin Cox
Priority: Minor
It would be really nice if you could create UDFs that had a non-nullable return
type. This way the schema could continue to match the logical contents of the
dataframe
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