GitHub user chenghao-intel opened a pull request:
https://github.com/apache/spark/pull/8409
[SPARK-10215][SQL][WIP]Div of Decimal returns null
```scala
val d = Decimal(1.12321)
val df = Seq((d, 1)).toDF("a", "b")
df.selectExpr("b * a / b").collect() // => Array(Row(null))
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/chenghao-intel/spark decimal_div
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8409.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 #8409
----
commit 73e8544db8c915a2d5fd1b5cf5616b167ccf7a4b
Author: Cheng Hao <[email protected]>
Date: 2015-08-25T03:04:05Z
change the MAX_SCALE for decimal
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