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: [EMAIL PROTECTED], http://www.sai.msu.su/~megera/
phone: +007(495)939-16-83, +007(495)939-23-83
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