GitHub user clockfly opened a pull request:
https://github.com/apache/spark/pull/13333
[SPARK-13445][SQL]Improves error message and add test coverage for Window
function
## What changes were proposed in this pull request?
Add more verbose error message when order by clause is missed when using
Window function.
## How was this patch tested?
Unit test.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/clockfly/spark spark-13445
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13333.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 #13333
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commit 5a71f89f7319bd50daf6e31c5d2b0fd10e759834
Author: Sean Zhong <seanzh...@databricks.com>
Date: 2016-05-26T00:51:23Z
SPARK-13445, add UT for Windows function when order by is not specified.
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