GitHub user hvanhovell opened a pull request:
https://github.com/apache/spark/pull/9566
[SPARK-9241][SQL] Supporting multiple DISTINCT columns - follow-up (3)
This PR is a 2nd follow-up for
[SPARK-9241](https://issues.apache.org/jira/browse/SPARK-9241). It contains the
following improvements:
* Fix for a potential bug in distinct child expression and attribute
alignment.
* Improved handling of duplicate distinct child expressions.
* Added test for distinct UDAF with multiple children.
cc @yhuai
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hvanhovell/spark SPARK-9241-followup-2
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9566.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 #9566
----
commit ea4ea69ca4980163c9a31aa4f65b6db6121d62e3
Author: Herman van Hovell <[email protected]>
Date: 2015-11-09T11:44:26Z
Fix potential bug in distinct child expression and attribute alignment &
improve handling of duplicate distinct child expressions. Added test for
distinct UDAF with multiple children.
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