Re: Re: Functions returning sets

I think you probably could use contrib/intarray if you redesign
your scheme.

Oleg

On Sat, 19 May 2001, mlw wrote:

> Tom Lane wrote:
> >
> > Don Baccus <dhogaza(at)pacifier(dot)com> writes:
> > > What's so hard about writing "IN" rather than "=" ???
> >
> > Even more to the point, if we did adopt such a (crazy IMHO)
> > interpretation of '=', what makes anyone think that it'd be
> > any more efficient than IN?
> >
> > AFAICT, mlw is hoping that redefining '=' would magically avoid the
> > performance problems with IN, but my bet is it'd be just the same.
> >
> > What we need to do is teach the system how to handle WHERE ... IN ...
> > as a form of join. Changing semantics of operators isn't necessary
> > nor helpful.
>
> I will defer, of course, to your interpretation of '=', but I still think it
> (if implemented efficiently) could be cool. However, I hang my head in shame
> that I didn't see this syntax:
>
> select table.* from table, (select function() as field) as result where
> table.field = result.field;
>
> It seems to be pretty efficient, and satisfies the main criteria that I needed,
> which was a full text search could be used on select with no external
> programming language.
>
> Currently my system can't be used without an external programming language, and
> this is a huge, if awkward solution. Thanks all.
>
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Regards,
Oleg
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Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
Sternberg Astronomical Institute, Moscow University (Russia)
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