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https://issues.apache.org/jira/browse/FLINK-5514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15996041#comment-15996041
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ASF GitHub Bot commented on FLINK-5514:
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GitHub user godfreyhe opened a pull request:
https://github.com/apache/flink/pull/3818
[FLINK-5514] [table] Implement an efficient physical execution for
CUBE/ROLLUP/GROUPING SETS
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/godfreyhe/flink FLINK-5514
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/flink/pull/3818.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #3818
----
commit fa876e41845b4d03bd896349e7a3539d278ccfdc
Author: godfreyhe <godfre...@163.com>
Date: 2017-05-04T02:08:04Z
[FLINK-5514] [table] Implement an efficient physical execution for
CUBE/ROLLUP/GROUPING SETS
----
> 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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