Michael, Le Mardi 16 Novembre 2004 16:32, Michael Fuhr a écrit : > On Tue, Nov 16, 2004 at 03:55:58PM +0100, Hervé Piedvache wrote: > > WHERE s.idx_site_name @@ to_tsquery('atari'); > > How much text does each site_name field contain? From the field > name I'd guess only a few words. Based on my own experience, if > the fields were documents containing thousands of words then I'd > expect tsearch2 to be faster than ILIKE by an order of magnitude > or more. Yes site name ... is company names or web site name ... so not many word in each record ... but I don't understand why more words are more efficient than few words ?? sorry ... Regards, -- Hervé Piedvache Elma Ingénierie Informatique 6 rue du Faubourg Saint-Honoré F-75008 - Paris - France Pho. 33-144949901 Fax. 33-144949902