Hi Folks, I have somewhat complex scoring/boosting requirement.
Say I have 3 text fields A, B, C and a Numeric field called D. Say My query is "testrank". Scoring should be based on following: Query matches 1. text fields A, B and C, & Highest value of D (highest boost/rank) 2. A and B, & Highest value of D (2nd highest) 3. A and C, & Highest value of D (3rd highest) 4. B and C, & Highest value of D (4th highest) 5. B, & Highest value of D (5th highest) 6. C, & Highest value of D (6th highest) i). If I use the standard query, it will be query (with boost) something like this: query = (A:testrank AND B:testrank AND C:testrank)^10 OR (A:testrank AND B:testrank)^9 OR (A:testrank AND C:testrank)^8 OR (B:testrank AND C:testrank)^7 OR (A:testrank)^6 OR (B:testrank)^5 OR (C:testrank)^4 sort = by Score (primary), Field D (Secondary) Also, I do need to override Similarity such that tf, idf etc doesn't interfere; and all docs should score purely based on boost values, I have specified. That way seconday sort can be effective. This will be a poor query so I would like to avoid it. ii). I have never used DisjunctionMaxQuery (or Solr qt=DisMax) and at first glance, it appeared just like what I need (with tiebreaker = 0). However it is not. If I understand it correctly #1, #2 and #3 will score equally because it just score based on highest boost (which is A for #1, #2 and #3). This will not work. iii) Wondering, Do I have to write a custom Query (custom score) like DisjunctionMaxQuery which scores based on sum of matching fields instead of just taking highest. Wondering, if I could override the scoring of DisjustionMaxQuery such that it takes sum of scores from sub-queries. If anyone has any clever suggestion, I will really really appreciate. Thanks, Ravi
