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From "Davies Liu (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-10915) Add support for UDAFs in Python
Date Mon, 17 Oct 2016 22:05:58 GMT

    [ https://issues.apache.org/jira/browse/SPARK-10915?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15583638#comment-15583638
] 

Davies Liu commented on SPARK-10915:
------------------------------------

Currently all the aggregate functions are implemented in Scala, which execute one row at a
time. This will not work for Python UDAF, the overhead between JVM and Python process will
make it super slow.

> Add support for UDAFs in Python
> -------------------------------
>
>                 Key: SPARK-10915
>                 URL: https://issues.apache.org/jira/browse/SPARK-10915
>             Project: Spark
>          Issue Type: Improvement
>          Components: PySpark, SQL
>            Reporter: Justin Uang
>
> This should support python defined lambdas.



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