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https://issues.apache.org/jira/browse/SPARK-4366?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Cheng Hao updated SPARK-4366:
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Attachment: aggregatefunction_v1.pdf
Draft Design Doc.
> Aggregation Optimization
> ------------------------
>
> Key: SPARK-4366
> URL: https://issues.apache.org/jira/browse/SPARK-4366
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Cheng Hao
> Attachments: aggregatefunction_v1.pdf
>
>
> This improvement actually includes couple of sub tasks.
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