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https://issues.apache.org/jira/browse/SPARK-23836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16421044#comment-16421044
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holdenk commented on SPARK-23836:
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cc [~bryanc]
> Support returning StructType & MapType in Arrow's "scalar" UDFS (or similar)
> ----------------------------------------------------------------------------
>
> Key: SPARK-23836
> URL: https://issues.apache.org/jira/browse/SPARK-23836
> Project: Spark
> Issue Type: Improvement
> Components: PySpark
> Affects Versions: 2.4.0
> Reporter: holdenk
> Priority: Major
>
> Currently not all of the supported types can be returned from the scalar
> pandas UDF type. This means if someone wants to return a struct type doing a
> map operation right now they either have to do a "junk" groupBy or use the
> non-vectorized results.
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