Ben <midfi...@gmail.com> writes: > my guess is that it has to do with the selectivity of the @> operator. i've > looked and noticed that the selectivity functions for @> and other period > operators are basically stubs, with constant selectivity. my questions are :
> 1 - am i wrong in my assessment? is the constant contsel, areasel, etc > hurting us? The stub selectivity functions definitely suck. > 2 - how hard would it be to implement contsel et al for period data types? If it were easy, it'd likely have been done already :-( However, having said that: the constant value of the stub contsel function is intended to be small enough to encourage use of an indexscan. Maybe we just need to decrease it a bit more. Have you investigated what the cutover point is for your queries? regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers