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https://issues.apache.org/jira/browse/SPARK-7235?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen updated SPARK-7235:
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Assignee: Cheng Hao
> Refactor the GroupingSet implementation
> ---------------------------------------
>
> Key: SPARK-7235
> URL: https://issues.apache.org/jira/browse/SPARK-7235
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Cheng Hao
> Assignee: Cheng Hao
> Fix For: 1.5.0
>
>
> The logical plan `Expand` takes the `output` as constructor argument, which
> break the references chain for logical plan optimization. We need to refactor
> the code.
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