Removing Users and Revoking Privileges

[Carl McCalla <Carl(dot)Mccalla(at)noaa(dot)gov>]

To All,

I am running Postgres version 7.4.19. 

One thing I wanted to do and have successfully completed is changing the 
ownership of a Postgres database and all of its tables to a new owner.  
I have also successfully granted access privileges to the new owner.  

What I have been unable to do successfully is to remove two users who 
should no longer have access to the database or its tables.  As super 
user postgres, I have attempted to REVOKE access privileges for those 
two users, but to no avail.  The REVOKE command appears to work and does 
not generate an error message, however, upon inspection the two users 
remain and continue to have all of the same access privileges they had 
before executing the REVOKE command.

I do not know what user originally created the database.  I have though 
attempted to revoke privileges as not only user postgres, but also as 
the new owner of the data base, as well as both of the two users for 
which I wish to revoke access privileges.

The two users I want to remove or, at least revoke privileges for, are 
also associated with other databases, so I don't believe I can simply do 
a DROP USER.  If I do that, I may wind up negatively impacting other 
Postgres databases.

Let me know, if you have any ideas.

Thanks

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