GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/12959
[SPARK-15184] [SQL] Fix Silent Removal of An Existent Temp Table by Rename
Table
#### What changes were proposed in this pull request?
Currently, if we rename a temp table `Tab1` to another existent temp table
`Tab2`. `Tab2` will be silently removed. This PR is to detect it and issue an
exception message.
In addition, this PR also detects another issue in the rename table
command. When the destination table identifier does have database name, we
should not ignore them. That might mean users could rename a regular table.
#### How was this patch tested?
Added two related test cases
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark rewriteTable
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12959.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 #12959
----
commit d7a2190dcaafa8c7be40aeeba2fa4c4eee31a3c5
Author: gatorsmile <[email protected]>
Date: 2016-05-06T17:06:49Z
rename temp table
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