On Fri, 2008-09-19 at 11:25 -0700, Jeff Davis wrote:
> What's the n_distinct for start_time?
Actually, I take that back. Apparently, PostgreSQL can't change "x
BETWEEN y AND y" into "x=y", so PostgreSQL can't use n_distinct at all.
That's your problem. If it's one day only, change it to equality and it
should be fine.
Regards,
Jeff Davis