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https://issues.apache.org/jira/browse/SPARK-6817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15095590#comment-15095590
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Sun Rui commented on SPARK-6817:
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[~mpollock], this PR will support row-based UDF. UDF operating on columns may
be supported after R UDAF is supported.
> DataFrame UDFs in R
> -------------------
>
> Key: SPARK-6817
> URL: https://issues.apache.org/jira/browse/SPARK-6817
> Project: Spark
> Issue Type: New Feature
> Components: SparkR, SQL
> Reporter: Shivaram Venkataraman
> Attachments: SparkR UDF Design Documentation v1.pdf
>
>
> This depends on some internal interface of Spark SQL, should be done after
> merging into Spark.
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