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https://issues.apache.org/jira/browse/SPARK-11982?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15026458#comment-15026458
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Apache Spark commented on SPARK-11982:
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User 'davies' has created a pull request for this issue:
https://github.com/apache/spark/pull/9969
> Improve performance of CartesianProduct
> ---------------------------------------
>
> Key: SPARK-11982
> URL: https://issues.apache.org/jira/browse/SPARK-11982
> Project: Spark
> Issue Type: Improvement
> Reporter: Davies Liu
> Assignee: Davies Liu
>
> RDD.cartesian() is very slow, we should improve it or create a special
> version for SQL
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