Re: Tsearch2 lexeme position

Hello Oleg Bartunov,

Oleg Bartunov schrieb:

 > On Thu, 12 May 2005, Peter Schmelzer wrote:
 >
 >> Hi,
 >>
 >> this is an answer of thread
http://archives.postgresql.org/pgsql-general/2003-08/msg00694.php
 >>
 >> You say it exist a funktion to fin positions an frequency of lexems
for own calculate of an ranking since this time.
 >> But where is the description of this?
 >> May Im to blind but I spend a lot of time to search in internet for
this.
 >>
 >>
http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/docs/tsearch-V2-intro.html
 >>
http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/docs/tsearch2-guide.html
 >>
http://www.sai.msu.su/~megera/postgres/gist/tsearch/V2/docs/tsearch2-ref.html
 >> has to less examples to see it.
 >> May it is'nt in?..
 >>
 >> I need it to serch terms with more than one lexem and later for an
ranking for nearst lexems.
 >
 >
 >
 > ranking functions is already aware of this. See tsearch2.sql in
contrib/tsearch2/sql for examples. We don't have API to specify your own
 > ranking function. Do you really need it ?


Yes, i do. Me is given a real komplicatet concept for an ranking.
I dont need only a ranking for one, two or tree terms.
What I need is a system for give different terms diferent weights
and to search terms with more than one word. How near they are and there
frequency is important to.
I dont have seen rules to use the 'rank()' function for this.
I dont have seen any rules to use the 'rank()' as the one example on
youre webside.

I need the benefit of performance of an full text search and postgres is
the only non commercial DB-Syste can handle greater data sizes.
If u dont have an API for this, what can i do?
[humor]*panic!* :\[/humor]

greeds
Peter Schmelzer

 >>
 >> greeds
 >> Peter Schmelzer
 >>
 >> ---------------------------(end of broadcast)---------------------------
 >> TIP 8: explain analyze is your friend
 >>
 >
 >     Regards,
 >         Oleg
 > _____________________________________________________________
 > Oleg Bartunov, sci.researcher, hostmaster of AstroNet,
 > Sternberg Astronomical Institute, Moscow University (Russia)
 > Internet: oleg@sai.msu.su, http://www.sai.msu.su/~megera/
 > phone: +007(095)939-16-83, +007(095)939-23-83
 >
 >