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| author | Zhongshuai Pei <799203320@qq.com> | 2015-04-30 15:22:13 -0700 |
|---|---|---|
| committer | Reynold Xin <rxin@databricks.com> | 2015-04-30 15:22:13 -0700 |
| commit | 77cc25fb7473d8a06b727d2ba5ee62db1c651cf8 (patch) | |
| tree | e1e20c295c240e027b002df9e521b501d9800dd9 /project/SparkBuild.scala | |
| parent | 07a86205f9efc43ea1ec5edb97c21c32abe7fb8a (diff) | |
| download | spark-77cc25fb7473d8a06b727d2ba5ee62db1c651cf8.tar.gz spark-77cc25fb7473d8a06b727d2ba5ee62db1c651cf8.tar.bz2 spark-77cc25fb7473d8a06b727d2ba5ee62db1c651cf8.zip | |
[SPARK-7267][SQL]Push down Project when it's child is Limit
SQL
```
select key from (select key,value from t1 limit 100) t2 limit 10
```
Optimized Logical Plan before modifying
```
== Optimized Logical Plan ==
Limit 10
Project key#228
Limit 100
MetastoreRelation default, t1, None
```
Optimized Logical Plan after modifying
```
== Optimized Logical Plan ==
Limit 10
Limit 100
Project key#228
MetastoreRelation default, t1, None
```
After this, we can combine limits
Author: Zhongshuai Pei <799203320@qq.com>
Author: DoingDone9 <799203320@qq.com>
Closes #5797 from DoingDone9/ProjectLimit and squashes the following commits:
70d0fca [Zhongshuai Pei] Update FilterPushdownSuite.scala
dc83ae9 [Zhongshuai Pei] Update FilterPushdownSuite.scala
485c61c [Zhongshuai Pei] Update Optimizer.scala
f03fe7f [Zhongshuai Pei] Merge pull request #12 from apache/master
f12fa50 [Zhongshuai Pei] Merge pull request #10 from apache/master
f61210c [Zhongshuai Pei] Merge pull request #9 from apache/master
34b1a9a [Zhongshuai Pei] Merge pull request #8 from apache/master
802261c [DoingDone9] Merge pull request #7 from apache/master
d00303b [DoingDone9] Merge pull request #6 from apache/master
98b134f [DoingDone9] Merge pull request #5 from apache/master
161cae3 [DoingDone9] Merge pull request #4 from apache/master
c87e8b6 [DoingDone9] Merge pull request #3 from apache/master
cb1852d [DoingDone9] Merge pull request #2 from apache/master
c3f046f [DoingDone9] Merge pull request #1 from apache/master
Diffstat (limited to 'project/SparkBuild.scala')
0 files changed, 0 insertions, 0 deletions