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Dave Mason is looking for a way to prevent a user from running DBCC REINDEX:

After a little digging, I discovered the related database user is a member of the db_ddladmin fixed database role. Members of that role are permitted to run DBCC REINDEX. Since I have existing (more sensible) code in place for index maintenance, I don’t want the DBCC REINDEX operations to continue. Here’s the problem: I can’t find a direct way to DENY a database user from running DBCC commands. T-SQL syntax doesn’t support something like DENY DBCC TO <user> or DENY DBCC REINDEX TO <user>. MSDN documentation tells me the equivalent ALTER INDEX command requires at minimum ALTER permission on the table or view. I guessed that revoking or denying ALTER TABLE privileges might prevent a user from executing DBCC DBREINDEX, but that does not appear to be the case.

That’s painful.