Re: DDS Support

["M. Lazarus" <mlazarus@xxxxxxxx>]

Eric,

 See comment below.

At 6/28/00 09:34 PM -0700, you wrote:
> >   Now here's the rub. 
> Putting those features in SQL would make SQL
> > non-compatible w/ the rest of the world.  So all the cross
> platform
> > compatibility arguments fall my the wayside.  So now we're back
> where we
> > started from - IBM may as well enhance DDS and get it over
> with.


> What about the Domain keyword that most every
> SQL implementation I know of
> other than DB2 UDB supports? Then you can say that this field is a
> AccountNumber field and it would take on the attributes of the
> Domain
> AccountNumber.
>
> The syntax for the command is
>
> Create Domain AccountNumber as Integer
>
> Or you could be more creative and add check constraints to the
> domain
>
> Create Domain AccountNumber as Integer
>     Check((Value >= 100) Or Value Is Null)
>
> Then you will have the Handy Dandy AccountNumber DataType available for
> your
> SQL enjoyment :-)

1)  This sounds very much like the DB2 User Defined Data Types that
were implemented fairly recently.

2)  I believe that the issue here is the interface (i.e. data
definition tool). The functionality you're referring to is part of the
DB.  There's no technical reason that DSS couldn't be enhanced to
accommodate additional functionality.

 -mark