GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/11820
[SPARK-14004][SQL][MINOR] AttributeReference and Alias should only use the
first qualifier to generate SQL strings
## What changes were proposed in this pull request?
Current implementations of `AttributeReference.sql` and `Alias.sql` joins
all available qualifiers, which is logically wrong. But this implementation
mistake doesn't cause any real SQL generation bugs though, since there is
always at most one qualifier for any given `AttributeReference` or `Alias`.
This PR fixes this issue by only picking the first qualifiers.
## How was this patch tested?
(Please explain how this patch was tested. E.g. unit tests, integration
tests, manual tests)
Existing tests should be enough.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark spark-14004-single-qualifier
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/11820.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 #11820
----
commit 1a35c8af86e6d704a47b3398cfb6a3bfc12b7947
Author: Cheng Lian <l...@databricks.com>
Date: 2016-03-18T10:45:51Z
Only uses the first qualifier to generate SQL string
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