GitHub user chenghao-intel opened a pull request:
https://github.com/apache/spark/pull/5780
[SPARK-7235] [SQL] Refactor the grouping sets
The logical plan `Expand` takes the `output` as constructor argument, which
break the references chain. We need to refactor the code, as well as the column
pruning.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/chenghao-intel/spark expand
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5780.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 #5780
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commit c4395b404c20ca83bc06b69e889e0f4f53e536cf
Author: Cheng Hao <[email protected]>
Date: 2015-04-29T14:06:32Z
refactor the grouping sets
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