From: | Mark Gibson <gibsonm(at)cromwell(dot)co(dot)uk> |
---|---|
To: | Sebastian Davancens <sdavancens(at)gmail(dot)com> |
Cc: | pgsql-general(at)postgresql(dot)org |
Subject: | Re: Heritage |
Date: | 2004-09-09 14:10:55 |
Message-ID: | 439e2f820831406f8863b9d2bb9e4e7c41406481@cromwell.co.uk |
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Lists: | pgsql-general |
Sebastian Davancens wrote:
> Hi everyone. Im having a problem with heritage. The situation is the following:
> I have two tables, tbl_everyone and tbl_employees. tbl_employees
> inherits from tbl_everyone.
> In tbl_everyone, i store some information about everyone who is
> related with the place where i work: Name, ID (PK), Birth Date,
> Adress...
> Then, in tbl_employees i have aditional information, like area, position, etc.
> The problem appears when i have someone in tbl_everyone that becomes
> an employee. What do i have to do ? Consider that ID in tbl_everyone
> is used in auxiliar tables, so i cannot easily delete the person in
> tbl_everyone and insert it again in tbl_employees...
Have you tried deferred constraints, eg:
BEGIN;
SET CONSTRAINTS ALL DEFERRED;
DELETE ...;
INSERT ...;
END;
I've haven't had chance to test this, but I think this could
be what you're looking for.
--
Mark Gibson <gibsonm |AT| cromwell |DOT| co |DOT| uk>
Web Developer & Database Admin
Cromwell Tools Ltd.
Leicester, England.
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