Oh good! Thanks for clarifying, Uwe On Sat, Jul 9, 2022, 12:23 PM Uwe Schindler <u...@thetaphi.de> wrote:
> Hi > > FuzzyQuery/MultiTermQuery and I don't see any way to "boost" exact > > matches, or even to incorporate the edit distance more generally into > > the per-term score, although it does seem like that would be something > > people would generally expect. > > Actually it does this: > > * By default FuzzyQuery uses a rewrite method that expands all terms > as should clauses into a boolean query: > MultiTermQuery.TopTermsBlendedFreqScoringRewrite(maxExpansions) > * TopTermsReqrite basically keeps track of a "boost" factor for each > term and sorts the "best" terms in a PQ: > > https://github.com/apache/lucene/blob/main/lucene/core/src/java/org/apache/lucene/search/TopTermsRewrite.java#L109-L160 > * For each collected term the term enumeration sets a boost (1.0 for > exact match): > > https://github.com/apache/lucene/blob/dd4e8b82d711b8f665e91f0d74f159ef1e63939f/lucene/core/src/java/org/apache/lucene/search/FuzzyTermsEnum.java#L248-L256 > > So in short the exact term gets a boost factor of 1 in the resulting > term query, all other terms a lower one. > > Uwe > > -- > Uwe Schindler > Achterdiek 19, D-28357 Bremen > https://www.thetaphi.de > eMail:u...@thetaphi.de >
