On Wed, Jan 18, 2006 at 04:33:23PM -0800, Stephan Szabo wrote:
> On Wed, 18 Jan 2006, Jim C. Nasby wrote:
>
> > Yeah, this isn't about production code, it's about making life
> > easier on developers. Humans naturally want to group data into
> > natural sets, so for example all the fields dealing with a
> > person's address would appear together. But if you ever have to
> > use ALTER TABLE to add a field you're stuck with that field being
> > at the end of the table.
> >
> > Another consideration is that the best order for people isn't the
> > best order for the database. For example, grouping fields of the
> > same alignment together will save space (and depending on the
> > table that savings can really start to add up).
> >
> > It would definately be nice if the end-user concept of column
> > order wasn't tied to the physical order in the database.
>
> I agree with that. However, I'm not sure that an ALTER TABLE that
> reorders a logical column set is necessarily the right way to handle
> the issue. I think that the same path leads to realizations that a
> single logical ordering may not be sufficient for development.
>
> For example, I could see cases where say person A wants all the
> address columns together but person B only cares about country and
> wants the columns he deals with together in some other fashion.
Although it might be nice to have different column orderings, say
per-role, the SQL:2003 standard requires a single canonical ordering
in the information schema. How would we handle both?
Cheers,
D
--
David Fetter david@fetter.org http://fetter.org/
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