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| author | Daoyuan Wang <daoyuan.wang@intel.com> | 2015-02-13 13:46:50 -0800 |
|---|---|---|
| committer | Michael Armbrust <michael@databricks.com> | 2015-02-13 13:48:39 -0800 |
| commit | 2cbb3e433ae334d5c318f05b987af314c854fbcc (patch) | |
| tree | e69ee20041533e42e37024119b95f80caf0957e1 /docs | |
| parent | 5d3cc6b3d7e6ede3be68885e37e3c4ca3a608982 (diff) | |
| download | spark-2cbb3e433ae334d5c318f05b987af314c854fbcc.tar.gz spark-2cbb3e433ae334d5c318f05b987af314c854fbcc.tar.bz2 spark-2cbb3e433ae334d5c318f05b987af314c854fbcc.zip | |
[SPARK-5642] [SQL] Apply column pruning on unused aggregation fields
select k from (select key k, max(value) v from src group by k) t
Author: Daoyuan Wang <daoyuan.wang@intel.com>
Author: Michael Armbrust <michael@databricks.com>
Closes #4415 from adrian-wang/groupprune and squashes the following commits:
5d2d8a3 [Daoyuan Wang] address Michael's comments
61f8ef7 [Daoyuan Wang] add a unit test
80ddcc6 [Daoyuan Wang] keep project
b69d385 [Daoyuan Wang] add a prune rule for grouping set
Diffstat (limited to 'docs')
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