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From "Kim Haase (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-4505) Document that views, triggers, and constraints run with definer's rights rather than invoker's rights
Date Fri, 08 Jan 2010 14:56:54 GMT

    [ https://issues.apache.org/jira/browse/DERBY-4505?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12798035#action_12798035

Kim Haase commented on DERBY-4505:

Thanks, Rick.

To get that section into the TOC, I'll have to make it into a separate topic -- seems very
worthwhile, so then we can reference it directly (though not, sadly, link to it from other

I may need some help with the language on invoker/definer rights, but you can do that when
you review the draft changes.

> Document that views, triggers, and constraints run with definer's rights rather than
invoker's rights
> -----------------------------------------------------------------------------------------------------
>                 Key: DERBY-4505
>                 URL: https://issues.apache.org/jira/browse/DERBY-4505
>             Project: Derby
>          Issue Type: Bug
>          Components: Documentation
>    Affects Versions:,,,,,,,,
>            Reporter: Rick Hillegas
> Comments like the following can be found in the code, including this particular example
from DDLConstantAction.storeConstraintDependenciesOnPrivileges():
> 	 *  Views and triggers and constraints run with definer's privileges.
> This is an important behavior of Derby privileges which deserves to be documented. I
can find only one glancing reference to this behavior, viz., in the Reference Guide section
on the REVOKE command. There we learn that:
> "You must use the RESTRICT clause on REVOKE statements for routines. The RESTRICT clause
specifies that the EXECUTE privilege cannot be revoked if the specified routine is used in
a view, trigger, or constraint, and the privilege is being revoked from the owner of the view,
trigger, or constraint."
> From that lone statement, a clever reader might deduce that Derby views, triggers, and
constraints run with definer rather than invoker rights. But that is not the clear meaning
of that statement in the Reference Guide. To draw the necessary conclusion from that statement
the reader would have to be clever enough to understand the SQL Standard's tricky language
around definer and invoker rights--and that would be a very clever reader indeed.
> In short, we need to document this behavior explicitly. I consider this hole in our documentation
to be a serious enough defect that I am marking this issue as a Bug.

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