You can create a different RewriteMethod for MultiTermQueries (see the default used by Fuzzy query). This one is used to convert the FuzzyQuery on rewrite to a BooleanQuery. To achieve what you want to have just create a subclass of RewriteMethod that uses a DisjunctionMaxQuery instead of BooleanQuery to collect the clauses:
Subclass this abstract one: https://lucene.apache.org/core/8_6_0/core/org/apache/lucene/search/TopTermsRewrite.html ...and set it as RewriteMethod on the Fuzzy. Use one of the already existing subclasses as example and adapt it for DisjunctionMaxQuery. Uwe Am September 23, 2020 5:58:29 PM UTC schrieb "Eastlack, Kainoa" <keastl...@novetta.com>: >When performing a fuzzy search inside a BooleanQuery, it looks like the >default behavior is to score all fuzzy matches separately and then sum >them >up to get an aggregate score. However, I need it to instead score based >on >the maximum of each distinct match it might find, rather than the sum >of >them, to avoid overly inflated scores in some circumstances. > >For example, consider a query for "Bstn~2" and four documents >containing >"Boston", "Basin", "Boston Basin", and "Boston Boston Basin". The query >might respectively score them as 1, 1, 2, and 3 (or something like >that, >depending on the scorer used, of course). However, I need it to instead >score them as 1, 1, 1, and 2, since that's the count of just the most >frequent unique fuzzy match in each document. > >Ideally I'd like to use a built in mechanism for achieving this, but if >it's not available, a way to extend the BooleanQuery, BooleanWeight, >and/or >BooleanScorer classes to have slightly different scoring logic but >otherwise function exactly the same would also work, but all of those >are >either final classes or have no public constructor, effectively making >it >impossible to reuse their logic directly, as near as I can tell. > >If anyone has any ideas of how to approach this, it would be very >helpful. > >Thanks, >Kainoa -- Uwe Schindler Achterdiek 19, 28357 Bremen https://www.thetaphi.de
