[PostgreSQL-Hackers] How to construct an exact plan

On Mon, Aug 30, 2010 at 1:34 PM, Pei He wrote:
Hi,
I have developed a new operators, and I want to do some tests on it.
I do not want the optimizer to choose the plan for me, and I need to
construct a plan as exact as I want.

Can anyone provide me a way to achieve that?

Thanks
--
Pei