Oracle-L: 8.1.6: possible to set role in db's logon trigger?

From: Pardee, Roy E <roy.e.pardee_at_lmco.com>
Date: Mon, 13 Jan 2003 07:43:52 -0800
Message-ID: <F001.0052DAA4.20030113074352@fatcity.com>

Greetings all,

I'm trying to support a COTS application that is back-end agnostic & makes only minimal use of security on the db. In particular, it requires that users be granted a default role that has *very* heavy permissions--enough to do some major mischief should they ever figure out how to use odbc or sql*plus.

My collegues & I have devised a kludgy method for getting around this problem, involving a shill startup program that turns the default-ness of the role on & off in conjunction with users opening & closing the client program. This works, but is a pain to maintain.

I've recently discovered the v$session.program field & am now wondering whether it would be possible to use the new-fangled logon system trigger to set the role only for cases where v$session.program = the COTS client.

Can anybody comment as to whether this is a viable approach on an 8.1.6 database & if not, on a 9i db?

In particular, there are two things I don't know--first, how to select just the one row in v$session that corresponds to the current connection. If a user was to start up the COTS client & then connect to the same db via sql*plus, I would want the role set *only* for the COTS client session. My best thought so far here is to use the most recently started connection based on v$session.logon_time.

Second, whether the SET ROLE statement is legal in a logon trigger.

All help will be most welcome.

Thanks!

-Roy

Roy Pardee
Programmer/Analyst
SWFPAC Lockheed Martin IT
Extension 8487
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Author: Pardee, Roy E
INET: roy.e.pardee_at_lmco.com

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