Re: Distinct types

>>> Peter Eisentraut <Peter.Eisentraut@Sun.COM> wrote: 
> Here is an implementation of distinct types, known from SQL99 and 
> beyond.  They are like domains, except that they don't have defaults
or 
> constraints and they do not allow implicit casting to their base
type. 
> The latter aspect is what makes them distinct types.  They are useful
to 
> create more type-safe database schemas, to prevent using generic
types 
> such as text or int for everything and then mixing them in
inappropriate 
> ways.
I expect I'll be using this.  Thanks!
I notice there's no documentation yet.  Do you have a reference to a
good description of the feature, consistent with your implementation?
If not, a couple questions:
(1)  Can you compare a literal of the base type?
(2)  Can you explicitly cast to the base type?
-Kevin