On Tue, 2005-06-28 at 13:22, Martín Marqués wrote:
> El Mar 28 Jun 2005 13:58, PFC escribió:
> >
> > >> Here is where I get uncertain as to if this is possible. My idea is to
> > >> create a pseudo type that triggers the creation of it's lookup tables
> > >> the same way the SERIAL type triggers creation of a sequence and returns
> > >> an int with the right default value.
> >
> > Personnally I use one table which has columns (domain, name) and which
> > stores all enum values for all different enums.
> > I have then CHECK( is_in_domain( column, 'domain_name' )) which is a
> > simple function which checks existence of the value in this domain (SELECT
> > 1 FROM domains WHERE domain=$2 AND name=$1 LIMIT 1) for instance.
> > You can also use integers.
>
> I personally think that the ENUM data type is for databases that are not well
> designed. So, if you see the need for ENUM, that means you need to re-think
> your data design.
I would generally agree, however, a pseudo type like serial that created
the properly fk'd table with all the options in it would be quite nice
to have.