Re: Heritage

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 
Web Developer & Database Admin
Cromwell Tools Ltd.
Leicester, England.