GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/12759
[SPARK-14981][SQL] Throws exception if DESC is specified for sorting columns
## What changes were proposed in this pull request?
Currently Spark SQL doesn't support sorting columns in descending order.
However, the parser accepts the syntax and silently drops sorting directions.
This PR fixes this by throwing an exception if `DESC` is specified as sorting
direction of a sorting column.
## How was this patch tested?
A test case is added to test the invalid sorting order by checking
exception message.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark spark-14981
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12759.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 #12759
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commit 5a3aa2c55a3d7a600887e82b9663b52a366a4842
Author: Cheng Lian <l...@databricks.com>
Date: 2016-04-28T17:46:16Z
Throws exception if DESC is specified for sorting columns
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