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https://issues.apache.org/jira/browse/SPARK-23818?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16418754#comment-16418754
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Apache Spark commented on SPARK-23818:
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User 'WeichenXu123' has created a pull request for this issue:
https://github.com/apache/spark/pull/20934
> an official UDF interface for Spark SQL
> ---------------------------------------
>
> Key: SPARK-23818
> URL: https://issues.apache.org/jira/browse/SPARK-23818
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Wenchen Fan
> Priority: Major
>
> Nowadays the Spark UDF interface is pretty simple: it's basically just a
> lambda function.
> We should come up with a new one that can:
> 1. operate on InternalRow directly for better performance
> 2. define deterministic/mutable/nullable in the UDF itself
> 3. java friendly
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