On Fri, 2007-04-13 at 18:48 -0400, Tom Lane wrote: > Has anyone got any thoughts about the best way to do this?
I don't think we know enough to pick one variant that works in all cases. This requires more detailed analysis of various cases. Lets put in a parameter to allow the options to be varied. The purpose would be to look for some more information that allows us to see what the pre-conditions would be for each heuristic. Initially, we say this is a beta-only feature and may be withdrawn in the production version. Why did it not pick my index? is a tiring game, but one that must be played. I hope that the ORDER LIMIT optimization should reduce the number of indexes chosen to maintain sort order in the output. -- Simon Riggs EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
