| From: | Richard Huxton <dev(at)archonet(dot)com> |
|---|---|
| To: | Jure Kodzoman <jure(at)plsavez(dot)hr> |
| Cc: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: constrains problem... |
| Date: | 2005-12-07 18:57:07 |
| Message-ID: | 43973083.3070803@archonet.com |
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| Thread: | |
| Lists: | pgsql-sql |
Jure Kodzoman wrote:
> What i would like to do is create a trigger or a constraint which would
> on delete of an entry from table1 also deleted all entries containing
> code from
> table1 in table_rel. When i try to put a constraint via PgAdmin3 it says
> it can't do
> it because 't1code' is not primary key or unique.
>
> I understand the error, but what i would like to know is how to delete
> all fields from table_rel containing the 'table1' vaule being equal to
> 'code' being deleted from table1.
You put two foreign keys ON table_rel, referencing table1 and table2.
Set both to delete on cascade and you're done.
--
Richard Huxton
Archonet Ltd
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