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@svana.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.
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