GitHub user dongjoon-hyun opened a pull request:
https://github.com/apache/spark/pull/14251
[SPARK-16602][SQL] Coalesce should support various types.
## What changes were proposed in this pull request?
```
sql("select nvl('0', '1'), nvl('0', 1)")
```
## How was this patch tested?
Pass the Jenkins tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/dongjoon-hyun/spark SPARK-16602
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/14251.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 #14251
----
commit e3ed851f5c57970342d665f7087e1f0743d92f70
Author: Dongjoon Hyun <[email protected]>
Date: 2016-07-18T22:11:30Z
[SPARK-16602][SQL] Coalesce should support various types.
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