GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/15154
[SPARK-17494] [SQL] changePrecision() on compact decimal should respect
rounding mode
## What changes were proposed in this pull request?
Floor()/Ceil() of decimal is implemented using changePrecision() by passing
a rounding mode, but the rounding mode is not respected when the decimal is in
compact mode (could fit within a Long).
This Update the changePrecision() to respect rounding mode, which could be
ROUND_FLOOR, ROUND_CEIL, ROUND_HALF_UP, ROUND_HALF_EVEN.
## How was this patch tested?
Added regression tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark decimal_round
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15154.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 #15154
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commit cf0e445b600baad201062e77651bee3d907b42fd
Author: Davies Liu <dav...@databricks.com>
Date: 2016-09-19T21:47:23Z
changePrecision() on compact decimal should respect rounding mode
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