On Mon, Jul 20, 2009 at 2:22 PM, Robert James<srobertjames(at)gmail(dot)com> wrote:
> BTW, this is interesting, because there are only about 5 or 6 rows max
> returned from both queries - but I guess the planner expects more and hence
> changes the plan to remove duplicates.
If you sent the plans for the various attempts we might be able to
explain what's going on.
--
greg
http://mit.edu/~gsstark/resume.pdf