Hi,
Poking around Query/Weight/Scorer classes I finally started understanding how
some portions of the scoring works (imagine a lot of lightbulbs now). In one
of my Lucene use-cases I really just use it to pull N documents from an index,
and don't care for score (I sort by time). That lead me to look at
MatchAllDocsQuery and ConstantScoreQuery. I see they don't do anything with
IDF nor anything fancy with Similarity, and instead both queries return a score
equal to the query boost. Still, why do they even bother with the
multiplications in sumOfSquaredWeights() and normalize(float) methods?
public float sumOfSquaredWeights() {
queryWeight = getBoost();
return queryWeight * queryWeight;
}
public void normalize(float queryNorm) {
this.queryNorm = queryNorm;
queryWeight *= this.queryNorm;
}
Shouldn't that queryWeight = getBoost() be enough to get the query boost and
use it as a score?
Obviously, not all lightbulbs are on yet...
Thanks,
Otis
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