Re: return value of the trigger function

On Mon, Jan 10, 2005 at 15:15:33 +0100,
Jarek Pude?ko <jarek(dot)pudelko(at)tech(dot)ceti(dot)pl> wrote:
> Hi
>
> I have big problem with a trigger function.
> Defs:
>
> CREATE TABLE foo (id int2, name varchar(20));
>
> foo.id cannot be serial or autoint because it will not be unique.
>
> Now I need a trigger that return foo.id of the inserted record.
>
> INSERT INTO foo VALUES (max(foo.id)+1,'junk');

If you are really doing the above, you probably do want to use serial.

If you insist on not doing this your app should do something like
lock table, select max(foo.id)+1 from id, and then nsert using the
value returned bye the select and then whatever else you want to do.

>
>
> IMHO the trigger should be:
>
> CREATE TRIGGER tr_get_new_id
> AFTER INSERT on foo
> ON EACH ROW
> EXECUTE PROCEDURE get_new_id();
>
> But I cannot create the function :(
> I don't know what type should be input and how about output? trigger or
> int2?
>
> TIA,
>
>
> --
> Jarek Pudelko
> JP272-RIPE
>
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