GitHub user ueshin opened a pull request:
https://github.com/apache/spark/pull/15887
[SPARK-18442][SQL] Fix nullability of WrapOption.
## What changes were proposed in this pull request?
The nullability of `WrapOption` should be `false`.
## How was this patch tested?
Existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/ueshin/apache-spark issues/SPARK-18442
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15887.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 #15887
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commit a7140cd62c7293ebab9683344b14910b9e3c6ff5
Author: Takuya UESHIN <ues...@happy-camper.st>
Date: 2016-11-15T05:37:58Z
Fix nullability of `WrapOption`.
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