GitHub user goldmedal opened a pull request:
https://github.com/apache/spark/pull/18854
[SPARK-21629][SQL][WIP] Fix Or nullability
## What changes were proposed in this pull request?
Override nullable of Or Expression to make sure nullable behavior is
correct.
## How was this patch tested?
I'll add test case later
cc @viirya
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/goldmedal/spark master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18854.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 #18854
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commit be711d003f2831c1ab4b69fc2a119aefbba08743
Author: goldmedal <liugs...@gmail.com>
Date: 2017-08-05T14:44:04Z
Fix Or nullability
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