On Thu, May 19, 2011 at 10:42 PM, Kevin Grittner <kevin.gritt...@wicourts.gov> wrote: > Robert Haas wrote: >> Mark wrote: > >>> Could somebody explain me on which methods is based ts_rank and >>> how it works? I would appreciate some articles, if exist. > >> As far as I can tell, our documentation contains no useful >> information on this topic whatsoever. :-( > > There's some potentially useful information here: > > http://www.postgresql.org/docs/9.0/interactive/textsearch-controls.html#TEXTSEARCH-RANKING
Ah, yes. I didn't read that carefully enough. That is useful, but it doesn't really explain how it works. > Although I don't know if it addresses Mark's question very well. > Personally, I wonder how relevant ts_rank will be after knn-giswt > is out.... I don't see why it would be any less useful... though if someone could find a way to KNN-ify such searches, I'm sure there would be a lot of very happy users. Seems pretty difficult, though. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
