Re: [GENERAL] Joins and links

> Bruce,
>
> It is amazing when you get responses written this fast (so that the
> reponse arrives before the copy of the message from the list).

Yep.

> > but in fact, heap already does this, doesn't it?
>
> heap? I am not sure what you mean.

Heap is our base table structure.  Records are always inserted on the
end of the heap file.  Vacuum removes old, superceeded rows.

>
> > I guess if you only add occasionally, it is OK.
> > Also, our no-over-write table structure had a tendency to mess up that
> > ordering because updated rows do not go into the same place as the
> > original row.
>
> I have just been thinking a bit more and have realised that the
> multi-generational architecture of 6.5 (which I have used in Interbase)
> means that probably both clustering (in thr dynamic sense) and full
> record number support as request by Leon are impractical.

Yes, would be a big problem.  Most commercial databases have found that
the network data model is impractical in most cases.


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