Re: somebody working on: Prevent default re-use of sysids for dropped users and groups?

Am 06.12.2004 um 23:27 schrieb Tom Lane:

> schmidtm  writes:
>> Do I get that right: the only reason to do max(sysid) or a
>> user-supplied ID in CreateUser() (commands/user.c) is that we don't
>> have the ability to get sequences over the *.BKI/initdb mechanism?
>
> No, that's not quite the direction of the problem.  The real reason
> those facilities are there is so that you can deliberately create a 
> user
> having a previously-used sysid.  And the only reason why that is needed
> is that we don't have dependency tracking for references to users and
> groups.  If you could be certain that there were no remaining 
> references
> to a userid when it is dropped, there would be no need to be able to
> resurrect it.  And that would mean that we could forget the whole sysid
> assignment mess and just use the regular OID generator to create unique
> IDs for users and groups.
>
> Using a shared sequence instead of max(sysid) would be merely an
> incremental improvement in the existing sysid assignment rules --- it
> wouldn't eliminate the entire kluge at one blow.
>
> So if Alvaro's thing works out, the shared-sequence problem becomes 
> moot.
> Probably that's a good reason not to spend time on it just yet.
>
> 			regards, tom lane
>
>

makes totally sense to me. Let's wait for Alvaro's stuff.

By the way: Do you have an idea about a small or
medium sized task from the TODO-List for a newbee, which gets me up to 
speed?(!Win32)

The TODO-List is a good starting point, but I cannot figure out who 
works on what.

cheers,

Matthias

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Matthias Schmidt
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