Hi all,
Sorry to bother the list, since I'm pretty sure the answer is no, but
I'm trying to figure out if it's possible to prevent a user from
dropping some tables in a database while allowing him/her to drop
others. I've seen requests on the list for something similar, but not
a solution.
Specifically, for a class, I would like to have students practice SQL
using a database I've created with some tables in it. The practice
includes creating and dropping tables, but I would like to prevent
students from dropping my tables (or each other's I suppose, but
that's optional). This problem generalizes to other permissions,
e.g., to allow a user to read any table in a database except a
specified one.
The permission system described in the manual indicates that the
search from general to specific (user to db + host to table and
column) stops if permission is granted. It doesn't seem to be
possible to grant a general permission (you can drop tables), then
take it back in a specific case (except not this one).
So, ideas I've come up with:
1) tell them not to drop my tables. This will work for a lab, but
it's not really a solution. Still, it's probably what I'll do.
2) make a list of the table names they're allowed to create (e.g.,
their last names), then explicitly grant permission to drop (and
create) just those. This will work, but it doesn't generalize very
well.
3) put my tables in a different database that is protected, then
teach them how to write queries that span databases. I think this
will work, but at the expense of a bit of complexity in class.
I'm hoping that someone will have a better idea.
--
Kevin Crowston
Syracuse University Phone: +1 (315) 443-1676
School of Information Studies Fax: +1 (315) 443-5806
4-206 Centre for Science and Technology EMail: [EMAIL PROTECTED]
Syracuse, NY 13244-4100 USA Web: http://crowston.syr.edu/
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