Oleg Bartunov <[EMAIL PROTECTED]> writes: > On Sat, 8 Mar 2008, Jan Urbaski wrote: >> I have a feeling that in many cases identifying the top 50 to 300 lexemes >> would be enough to talk about text search selectivity with a degree of >> confidence. At least we wouldn't give overly low estimates for queries >> looking for very popular words, which I believe is worse than givng an >> overly >> high estimate for a obscure query (am I wrong here?).
> Unfortunately, selectivity estimation for query is much difficult than > just estimate frequency of individual word. It'd be an oversimplification, sure, but almost any degree of smarts would be a huge improvement over what we have now ... 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