rmuir commented on PR #12169:
URL: https://github.com/apache/lucene/pull/12169#issuecomment-1479355672

   > Would your worries be assuaged if we created a separate 
`QueryBoostAttribute` class @rmuir? Then `QueryBuilder` can use that, and we 
can add checks for negative boosts, javadocs that say it should only be used 
for query time analysis, etc.
   
   It would certainly be a LOT less offensive than using FuzzyQuery's BoostAtt?
   
   But I still don't think analysis pipeline should be involved in this way, in 
query formulation. It is confusing in many ways, especially with boosts that 
will get silently dropped at index-time, confusing users. So I'd really rather 
us avoid analysis chain doing this stuff. it is mixing separate concerns in a 
very bad way: analysis chain is supposed to be about tokenization and boosts 
are supposed to be in the domain of higher level query parsers/MLT as it 
represents query intent (and also makes no sense at index time). See my comment 
above about whether this should even be an analyzer :) 
   
   I really see it closer to "query expansion" (e.g. closer in functionality to 
MLT). 
   


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