Re: constrains problem...

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