Re: Generic Modeling

Thanks for the response, James.

I look forward to the extended example when it is posted.

Dan

James <jraustin1_at_hotmail.com> wrote in message news:a6e74506.0201091518.6886594f_at_posting.google.com...
> > Based on the structure you presented...
> > List the plant names of companies that have line units with the same
type
> > of equipment, provided that the cities where the plants are located are
not
> > in the same city and that the number of plant floors exceeds three.
>
> I am assuming you are referring to one type of equipment and the
> equipment could be located anywhere below the level of a Complex (ie
> VortexEngComplex).
>
> > List the results in a structure that is representative of company name,
plant
> > name, plant location, number of floors, and line units per floor."
>
> The resulting objset would contain the matching objects in the
> original structure and does not return a new structure. Note,
> different companies may have different/missing levels.
>
> > Is there a data access language or syntax that would allow a somewhat
rapid
> > construction of this query? Or would it involve a degree of
hard-coding?
>
> Simple queries can be contructed via graphical interface
> (www.xdb1.com/Basics/Query.asp). More complex queries, like the above,
> would require code.
>
> > Would performance be degraded in terms of access paths since the query
> > doesn't seem to follow the natural hierarchal structure? And if so, can
> > indexes be modified or added to enhance performance in a flexible way?
>
> All data in XDb is indexed. Specifically instances of each class are
> indexed. User cannot modify/add indexes.
>
> > An example of how the query would be manifested in Xdb would be great!
>
> An extended example is being developed and will be posted at
> www.xdb1.com/Example/Ex046.asp
Received on Sat Jan 12 2002 - 09:40:20 CET