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Be careful dropping users in 8.1.7!

From: Kirsh, Gary <gary.kirsh_at_gs.com>
Date: Tue, 29 May 2001 12:05:45 -0700
Message-ID: <F001.00312704.20010529115230@fatcity.com>

As if you didn't have enough to worry about, here's a new bug to keep an eye out for. Ever since upgrading from 8.1.5 to 8.1.7, my client has been finding that table triggers would sporadically disappear mysteriously. Poof! Gone without a trace. Turned on auditing for all DDL, but that didn't catch anything. The LAST_DDL_TIME of the triggerless table was not updated.

We finally tracked down the cause of the problem, and unearthed a new bug. If you have a user whose user id is the same as a table's object id, and you drop that user, Oracle will drop all the triggers on the table. It presumably means to drop any user triggers for that user, such as a logon trigger, but the recursive sql fails to check the object type when dropping the triggers.

So if this query finds any matching users/tables, and you have triggers on the table, don't drop the user!

select u.user#, u.name, o.owner, o.object_name, o.object_type, o.object_id from user$ u, dba_objects o
where o.object_id = u.user#
and object_type = 'TABLE'
and owner != 'SYS';

Development is working on a fix, the bug # 1803203 if anybody wants to track it.

Gary

Gary Kirsh
Next Extent, Inc.

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Author: Kirsh, Gary
  INET: gary.kirsh_at_gs.com

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