>There's some potentially useful information here: >http://www.postgresql.org/docs/9.0/interactive/textsearch-controls.html#TEXTSEARCH-RANKING
Thanks for reply. I was reading the documentation of PostgreSQL, but there it is not written the name of the used methods. Everywhere there is written, that ts_rank use standard ranking function. But it is difficult to say which is the standard function. Somewhere I found that it is maybe based on Vector space model and it seems to be truth, because in the code of tsrank.c is counted the frequency of words, but I am not sure of that :-( -- View this message in context: http://postgresql.1045698.n5.nabble.com/ts-rank-tp4384614p4414631.html Sent from the PostgreSQL - hackers mailing list archive at Nabble.com. -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
