GitHub user DoingDone9 opened a pull request:
https://github.com/apache/spark/pull/5770
[SPARK-7225][SQL] CombineLimits optimizer does not work
SQL
```
select key from (select key from src limit 100) t2 limit 10
```
Optimized Logical Plan before modifying
```
== Optimized Logical Plan ==
Limit 10
Limit 100
Project key#3
MetastoreRelation default, src, None
```
Optimized Logical Plan after modifying
```
== Optimized Logical Plan ==
Limit 10
Project [key#1]
MetastoreRelation default, src, None
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/DoingDone9/spark limitOptimizer
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5770.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 #5770
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