From: | Jan Wieck <JanWieck(at)Yahoo(dot)com> |
---|---|
To: | "Roderick A(dot) Anderson" <raanders(at)acm(dot)org> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Update of foreign key values |
Date: | 2003-08-14 16:42:08 |
Message-ID: | 3F3BBBE0.1060805@Yahoo.com |
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Thread: | |
Lists: | pgsql-general |
Roderick A. Anderson wrote:
> I have two tables in two databases (Pg 7.2.1 - yes I need to upgrade but
> there are several other dependencies I have to resolve first) and I need
> to update one database's tables so they can be merged into the other
> database's table. I know I can drop the constraints and update the tables
> (primary key, and foreign key) but was hoping I'd not have to do that.
> An attempt at using the techniques in Joel Burton's "Referential
> Integrity Tutorial & Hacking the Referential Integrity tables" was
> unsuccessful.
>
> Is there a method I can use to add 1000 to all the primary and foreign
> keys in one pass? Searches using Google and the PostgreSQL docs turned up
> nothing useful to my situation. I see if the table/constraint would have
> been created differently the updates would have cascaded but that did
> not happen.
Strikes me as a perfect example for having the constraint defined "ON
UPDATE CASCADE". Or making it "DEFERRABLE" and do both changes in a
transaction after setting the constraint deferred.
Jan
--
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