* Tom Lane <[EMAIL PROTECTED]> [02-10-01 18:02]:
> Stephan Szabo <[EMAIL PROTECTED]> writes:
> > I think you could use EXISTS for that,
> > select EXISTS (<query>); should give a true/false on whether the
> > query returned any rows. I'm not sure if it stops after one row
> > or not, but if it doesn't you can add a limit 1 to the query.
>
> Yes it does stop after one row; and furthermore, the planner knows to
> generate a fast-start plan for it. (Or at least it's supposed to
> ... hmm, this seems to be broken in current sources ...) Anyway,
> there's no need for LIMIT 1 inside an EXISTS, because the planner
> assumes that automatically.
Thank you muchly, I did some profiling and SELECT EXISTS is indeed
exactly what I wanted.
-Kevin Way
--
Kevin Way <[EMAIL PROTECTED]>
http://www.overtone.org/
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