Message-ID: <408837C3.6010007@highstreetnetworks.com>
Date: Thu, 22 Apr 2004 17:23:15 -0400
From: Glenn MacGregor <gtm@highstreetnetworks.com>
Organization: HighStreet Networks
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To: pgsql-sql@postgresql.org
Subject: Cascade delete question
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Hi All,

I am using a cascade delete on the following table:

vid    vname        parentname
1     n1@test.com
2     n2@test.com         n1@test.com
3     n3@test.com         n1@test.com
4     n4@test.com         n1@test.com
5     n5@test.com         n3@test.com

So the delete cascade states if I am deleting a row whose vname matches 
the parentname delete those rows and it works fine.

I just changed the values of parentname (but the vname values stay the same)

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

Is there a way to do the same cascade delete with these values? I can 
select the correct info from vname in a query:

select substring(vname, from 0 for position('@' in vname)) from table1;

This works, so I tried to put that in the cascade but it failed.

Is there any way to accomplish this?

     Thanks

         Glenn MacGregor