Tom Lane said the following on 05/11/2009 07:02 PM:
> where we're off by a factor of 1500+ :-(
>
> I think most likely the ~~ operator is the biggest problem.
> Unfortunately 8.1's estimator for ~~ is not terribly bright. You could
> try increasing your statistics target but I don't think it will help
> much. Is there any chance of updating to 8.2 or later? 8.2 can do
> significantly better on this type of estimate as long as it has enough
> stats.
>
> In any case I'd suggest raising default_statistics_target to 100 or so,
> as you seem to be running queries complex enough to need good stats.
> But I'm not sure that that will be enough to fix the problem in 8.1.
>
> regards, tom lane
>
I should have mentioned the statistics for every column are already set
to 1000. I guess we'll have to add an upgrade to the project list.
Thanks for the info.
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