GitHub user kiszk opened a pull request:
https://github.com/apache/spark/pull/21481
[SPARK-24452][SQL][Core] Avoid possible overflow in int add or multiple
## What changes were proposed in this pull request?
This PR fixes possible overflow in int add or multiply.
The following assignments may cause overflow in right hand side. As a
result, the result may be negative.
```
long = int * int
long = int + int
```
To avoid this problem, this PR performs cast from int to long in right hand
side.
## How was this patch tested?
Existing UTs.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/kiszk/spark SPARK-24452
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21481.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 #21481
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commit 324fd5ccb73c8017f5537031db21b687ac1ca27a
Author: Kazuaki Ishizaki <ishizaki@...>
Date: 2018-06-01T20:22:34Z
initial commit
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