Hi,
GEQO's only function, basically, is to search for the join order to use.
> If you're constraining the join order completely with
> join_collapse_limit=1 then forcing the GEQO path to be taken would just
> add pointless overhead. (If it does anything at all ... I don't remember
> the logic exactly but we might be bright enough not to bother with GEQO in
> such a situation, regardless of geqo_threshold.)
>
Got it. Thanks a lot.
Regards,
Juan José Santamaría