On Wed, 4 Jul 2007, Joshua N Pritikin wrote:
1. What is the advantage of the tsearch2() trigger? Why can't I write my own trigger which does approximately:
no advantage, it's just an example.
UPDATE manuscript set manuscript_vector = setweight(to_tsvector(manuscript_genre), 'A') || setweight(to_tsvector(manuscript_title), 'B') || to_tsvector(manuscript_abstract); 2. Is there a way to know in advance the maximum return value of the rank function? I have lots of other information to include in the goodness-of-match score besides the fulltext match rank so I would prefer a tsearch2 rank score between 0 and 1. Do I need to write my own rank function?
what's about simple normalization formulae, like rank/(rank+1) ? Regards, Oleg _____________________________________________________________ Oleg Bartunov, Research Scientist, Head of AstroNet (www.astronet.ru), Sternberg Astronomical Institute, Moscow University, Russia Internet: oleg@xxxxxxxxxx, http://www.sai.msu.su/~megera/ phone: +007(495)939-16-83, +007(495)939-23-83
