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https://issues.apache.org/jira/browse/HIVEMALL-48?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15859653#comment-15859653
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Takeshi Yamamuro commented on HIVEMALL-48:
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The latest Spark v2.1.0 does not support codegen for `GenerateExec`. This
codegen has been supported from this pr
(https://github.com/apache/spark/commit/7ca7a635242377634c302b7816ce60bd9c908527).
So, this ticket should be fixed for upcoming Spark releases.
> Support codegen for EachTopK
> ----------------------------
>
> Key: HIVEMALL-48
> URL: https://issues.apache.org/jira/browse/HIVEMALL-48
> Project: Hivemall
> Issue Type: New Feature
> Reporter: Takeshi Yamamuro
> Labels: spark
>
> https://github.com/apache/incubator-hivemall/blob/master/spark/spark-2.1/src/main/scala/org/apache/spark/sql/catalyst/expressions/EachTopK.scala#L124
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