Re: Shortcut for defining triggers

On Sun, Jan 23, 2005 at 03:49:22PM -0600, Jim C. Nasby wrote:
> Sorry if this is old, but I couldn't find it in the archives...
>
> How difficult would it be to provide a means to define a trigger in
> one statement? Something like a combination of CREATE TRIGGER and
> CREATE FUNCTION? Being able to define them seperately is awesome for
> generic cases where you can use one function for a bunch of
> different tables, but it's a pain in the cases where you need a
> unique trigger for one table.

What would you want the function name to default to? What language,
or would you want to specify that somehow?

Here's a sketch of what such an API might look like:

CREATE TRIGGER foo_trg
BEFORE INSERT OR UPDATE ON foo_tab
FOR EACH ROW EXECUTE PROCEDURE
LANGUAGE PLPGSQL (/* params would go here if any */) $$
/* body here */
$$;

This would cause a foo_tab_b4_iu_func (how to address namespace
collisions?) to be created in the appropriate language with
appropriate params, then the foo_trg on the table.

Does SQL:2003 have anything to say about this? Also, what kind of
development effort would be involved with an implementation, assuming
SQL:2003 doesn't forbid?

Cheers,
D
--
David Fetter david(at)fetter(dot)org http://fetter.org/
phone: +1 510 893 6100 mobile: +1 415 235 3778

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