On Wed, 2004-08-04 at 14:53, Hicham G. Elmongui wrote:
> Hi,
> If I want the planner/optimizer to always choose merge join when it needs to
> join relations. How can I do it ?
>From my past experience, I'd guess what you're really trying to do is
STOP the planner from choosing a nested_loop join, in which case it's
quite easy:
set enable_nestloop = off;
select * from ...
Of course, you could apply the same basic trick to all other join
methods, and postgresql would then favor using the merge join.