GitHub user mgaido91 opened a pull request:
https://github.com/apache/spark/pull/21499
[SPARK-24468][SQL] Handle negative scale when adjusting precision for
decimal operations
## What changes were proposed in this pull request?
In SPARK-22036 we introduced the possibility to allow precision loss in
arithmetic operations (according to the SQL standard). The implementation was
drawn from Hive's one, where Decimals with a negative scale are not allowed in
the operations.
The PR handles the case when the scale is negative, removing the assertion
that it is not.
## How was this patch tested?
added UTs
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mgaido91/spark SPARK-24468
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/21499.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 #21499
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commit 2f72ebbf6902ffb9fb6133e6e91c40abdc24079c
Author: Marco Gaido <marcogaido91@...>
Date: 2018-06-05T16:16:55Z
[SPARK-24468][SQL] Handle negative scale when adjusting precision for
decimal operations
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