Robert Haas wrote: > Mark wrote: >> Could somebody explain me on which methods is based ts_rank and >> how it works? I would appreciate some articles, if exist. > As far as I can tell, our documentation contains no useful > information on this topic whatsoever. :-( There's some potentially useful information here: http://www.postgresql.org/docs/9.0/interactive/textsearch-controls.html#TEXTSEARCH-RANKING Although I don't know if it addresses Mark's question very well. Personally, I wonder how relevant ts_rank will be after knn-giswt is out.... -Kevin
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