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Michele Palmia edited comment on LUCENE-9269 at 3/10/20, 1:07 PM: ------------------------------------------------------------------ I was actually just looking at a [user report|https://mail-archives.apache.org/mod_mbox/lucene-dev/202003.mbox/%3CCALyzSEn%2BQFoT3MpNYkxw-dEK9jc59mSTvXqccuUVMMDAgOMMmA%40mail.gmail.com%3E] that came to lucene-dev and looked interesting. In their use case, they were using fuzzy queries, that in turn generate blended queries that are affected by this issue. Maybe users of BlendedQuery/FuzzyQuery should be able to find some form of warning in the docs? was (Author: micpalmia): I was actually just looking at a [user report|https://mail-archives.apache.org/mod_mbox/lucene-dev/202003.mbox/browser] that came to lucene-dev and looked interesting. In their use case, they were using fuzzy queries, that in turn generate blended queries that are affected by this issue. Maybe users of BlendedQuery/FuzzyQuery should be able to find some form of warning in the docs? > Blended queries with boolean rewrite can result in inconstitent scores > ---------------------------------------------------------------------- > > Key: LUCENE-9269 > URL: https://issues.apache.org/jira/browse/LUCENE-9269 > Project: Lucene - Core > Issue Type: Bug > Components: core/search > Affects Versions: 8.4 > Reporter: Michele Palmia > Priority: Minor > Attachments: LUCENE-9269-test.patch > > > If two blended queries are should clauses of a boolean query and are built so > that > * some of their terms are the same > * their rewrite method is BlendedTermQuery.BOOLEAN_REWRITE > the docFreq for the overlapping terms used for scoring is picked as follow: > # if the overlapping terms are not boosted, the df of the term in the first > blended query is used > # if any of the overlapping terms is boosted, the df is picked at (what > looks like) random. > A few examples using a field with 2 terms: f:a (df: 2), and f:b (df: 3). > {code:java} > a) > Blended(f:a f:b) Blended (f:a) > df: 3 df: 2 > gets rewritten to: > (f:a)^2.0 (f:b) > df: 3 df:2 > b) > Blended(f:a) Blended(f:a f:b) > df: 2 df: 3 > gets rewritten to: > (f:a)^2.0 (f:b) > df: 2 df:2 > c) > Blended(f:a f:b^0.66) Blended (f:a^0.75) > df: 3 df: 2 > gets rewritten to: > (f:a)^1.75 (f:b)^0.66 > df:? df:2 > {code} > with ? either 2 or 3, depending on the run. > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org