Tom Lane wrote:
> Having said that, though, I believe that it's also probably a
> *different* initial shuffle, which may well mean that GEQO gives
> different plans in some cases. That doesn't bother me as long as
> we only make the change in HEAD, but does anyone want to complain?
Uh, do we promise that plans found by geqo are stable? That would seem
odd to me -- wouldn't they change shape on a whim, say because the stats
are different? It seems odd to look for plan stability using a genetic
algorithm.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services