--- On Tue, 3/23/10, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Yeah --- that SELECT will result in no change to the
> variables, ie,
> they'll still be NULL. So the OVERLAPS always fails.
Tom & Andreas, I thank you for your help. Renaming the variables solved the problem. :-)
Regards,
Tuo