GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/3910
[SPARK-4296][SQL] Trims aliases when resolving and checking aggregate
expressions
This PR is a follow-up of PR #3248. We should not only trim `Alias` around
`GetField` but also all unnamed expressions when resolving and checking
aggregate expressions. Trimming all aliases is safe because `GROUP BY` doesn't
allow aliasing, thus all aliases added to an aggregate expression which is also
a grouping expression must be introduced while resolving unnamed expressions
like `GetField` and UDF calls.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark spark-4296
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/3910.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 #3910
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commit 60d10fbc49706bcd216fb984befb91ab357b1bb4
Author: Cheng Lian <[email protected]>
Date: 2015-01-06T13:07:22Z
Trims aliases when resolving and checking aggregate expressions
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