Aaron Bono ha scritto:
> On 7/28/06, *Manlio Perillo* <manlio_perillo@libero.it
> <mailto:manlio_perillo@libero.it>> wrote:
>
> Michael Glaesemann ha scritto:
> >
> > On Jul 28, 2006, at 17:37 , Manlio Perillo wrote:
> >
> >> There can be performancs problems in having primary keys of type
> TEXT?
> >> What about having a primary key of 3 columns (all of type TEXT)?
> >
> > What defines a problem in terms of performance is heavily dependent on
> > your particular needs and requirements. What are your
> requirements? What
> > profiling have you done to see where your performance bottlenecks
> may be?
> >
>
> I still don't have done profiling.
>
> Simply in the first version of my schema I used serial keys but the
> result is ugly and it force me to do a lot of joins.
>
>
>
> Ugly? Not sure what you mean by that.
>
Because serial ids are only surrogate keys.
My tables have well definited primary keys, the only problem is that
they are of type TEXT (and spawn up to 3 columns).
My concern is: how bad can be performance?
> I do understand the problem with so many joins. I use views so that the
> joins are only delt with once (in the database) and then all my
> applications run off the views. That way, the applications use very
> simple queries. The views also allow me to change the table structure
> (column names, more table normalization, etc.) without having to make
> changes to the application.
>
View are a good idea, thanks.
Regards Manlio Perillo
