GitHub user gatorsmile opened a pull request:
https://github.com/apache/spark/pull/12975
[SPARK-15199] Disallow Dropping Build-in Functions
#### What changes were proposed in this pull request?
As Hive and the major RDBMS behave, the built-in functions are not allowed
to drop. In the current implementation, users can drop the built-in functions.
However, after dropping the built-in functions, users are unable to add them
back.
#### How was this patch tested?
Added a test case.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/gatorsmile/spark dropBuildInFunction
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/12975.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 #12975
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commit 0c4b1a4b4be1e4f752313b60d484fa4cab8a1b35
Author: gatorsmile <[email protected]>
Date: 2016-05-07T06:57:17Z
initial fix.
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