Re: Cascade delete question

On Thu, Apr 22, 2004 at 16:46:31 -0400,
  Glenn MacGregor  wrote:
> 
> No problem this works great!
> 
> Now I have changed my data to
> 
> vid	vname		parentname
> 1	n1@test.com
> 2	n2@test.com	n1
> 3	n3@test.com	n1
> 4	n4@test.com	n1
> 5	n5@test.com	n3
> 
> Can I change my delete cascade constraint to do this substring query 
> instead of an exact match?

No.

> Is there anyway to accomplish what I need to do?

If the local part of the email address is a candidate key, separate it
from the domain name and make it the primary key.