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https://issues.apache.org/jira/browse/SPARK-3947?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14636199#comment-14636199
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Apache Spark commented on SPARK-3947:
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User 'yhuai' has created a pull request for this issue:
https://github.com/apache/spark/pull/7458
> Support UDAF
> ------------
>
> Key: SPARK-3947
> URL: https://issues.apache.org/jira/browse/SPARK-3947
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Pei-Lun Lee
> Assignee: Yin Huai
>
> Right now only Hive UDAFs are supported. It would be nice to have UDAF
> similar to UDF through SQLContext.registerFunction.
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