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https://issues.apache.org/jira/browse/SPARK-23141?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-23141:
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Assignee: (was: Apache Spark)
> Support data type string as a returnType for registerJavaFunction.
> ------------------------------------------------------------------
>
> Key: SPARK-23141
> URL: https://issues.apache.org/jira/browse/SPARK-23141
> Project: Spark
> Issue Type: Improvement
> Components: PySpark, SQL
> Affects Versions: 2.3.0
> Reporter: Takuya Ueshin
> Priority: Major
>
> Currently {{UDFRegistration.registerJavaFunction}} doesn't support data type
> string as a returnType whereas {{UDFRegistration.register}}, {{@udf}}, or
> {{@pandas_udf}} does.
> We can support it for {{UDFRegistration.registerJavaFunction}} as well.
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