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https://issues.apache.org/jira/browse/HIVEMALL-66?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16400008#comment-16400008
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Makoto Yui commented on HIVEMALL-66:
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[~maropu] Could this ticket be avoided? Or, still needed?
> Remove wrapper classes for Hive UDFs
> ------------------------------------
>
> Key: HIVEMALL-66
> URL: https://issues.apache.org/jira/browse/HIVEMALL-66
> Project: Hivemall
> Issue Type: Improvement
> Reporter: Takeshi Yamamuro
> Priority: Major
> Labels: Spark
>
> Since the latest Spark does not support Map and List as return types in Hive
> UDFs, we have some GenericUDF wrapper classes in the spark module. But, spark
> community currently starts discussing supports for these types. If these
> types supported in spark, we can remove these wrapper classes. Reference:
> https://github.com/apache/spark/pull/16886
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