Re: custom error messages/numbers

On Thu, May 27, 2004 at 06:26:53PM +0200, BARTKO Zoltan wrote:
> Folks,
>
> I am developing an app for PostgreSQL, entirely with stored functions (somewhat resembling the object-oriented approach. In fact it is not an app, just an API). All my functions return an integer value - 0 if the function was successful, another value otherwise.
>
> Until now, all parameter checking was done manually in the stored function (if param is null then return -8; end if; etc.) This makes things quite lengthy.
>
> I know about check constraints. However, upon error they throw an error message and abort the current transaction, So my question is: is there any possible way of throwing my own error messages upon a check constraint violation?

I don't know if this does what you want, but maybe RAISE ERROR is what
you're looking for.

--
Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.