Re: Column correlation drifts, index ignored again - Mailing list pgsql-performance

John Siracusa <siracusa@mindspring.com> writes:
> I think the key is to get the planner to correctly ballpark the number of
> rows in the date range.

I thought it was.  What you showed was

-> Index Scan using mytable_date_idx on mytable (cost=0.00..3071.70 rows=52155 width=23) (actual time=2.610..1688.111
rows=49679loops=1) 

which seemed plenty close enough to me.

            regards, tom lane