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https://issues.apache.org/jira/browse/FLINK-5514?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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godfrey he reassigned FLINK-5514:
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Assignee: godfrey he
> Implement an efficient physical execution for CUBE/ROLLUP/GROUPING SETS
> -----------------------------------------------------------------------
>
> Key: FLINK-5514
> URL: https://issues.apache.org/jira/browse/FLINK-5514
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: godfrey he
>
> A first support for GROUPING SETS has been added in FLINK-5303. However, the
> current runtime implementation is not very efficient as it basically only
> translates logical operators to physical operators i.e. grouping sets are
> currently only translated into multiple groupings that are unioned together.
> A rough design document for this has been created in FLINK-2980.
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