Re: Are circular REFERENCES possible ?

Hi all,

On Tuesday 07 August 2001  7:35 pm, Tom Lane wrote:
> Jan Wieck <JanWieck@Yahoo.com> writes:
> >     The point is that we based our implementation of foreign keys
> >     on the SQL3 specs. DEFERRED is not in SQL-92 AFAIK.
>
> I still have a concern about this --- sure, you can set up the circular
> references using ALTER TABLE, but will pg_dump dump them correctly?

Based on a small example I've done, I'd say yes. This is because pg_dump 
doesn't specify the contraints when it creates the tables, it does it at the 
end by using 'CREATE CONSTRAINT' commands.

I have a relationship Members -> teams -> regions -> members and it dumped 
and restored fine.

Gary

>
>             regards, tom lane
>
> ---------------------------(end of broadcast)---------------------------
> TIP 2: you can get off all lists at once with the unregister command
>     (send "unregister YourEmailAddressHere" to majordomo@postgresql.org)

-- 
Gary Stainburn
This email does not contain private or confidential material as it
may be snooped on by interested government parties for unknown
and undisclosed purposes - Regulation of Investigatory Powers Act, 2000