Any comments about this? Is this just the way queryNorm works or is this a bug?
Thanks, Peter On Fri, Feb 20, 2009 at 4:03 PM, Peter Keegan <peterlkee...@gmail.com>wrote: > > The explanation of scores from the same document returned from 2 similar > queries differ in an unexpected way. There are 2 fields involved, 'contents' > and 'literals'. The 'literals' field has setBoost = 0. As you an see from > the explanations below, the total weight of the matching terms from the > 'literal' field is 0. However, the weights produced by the matching terms in > the 'contents' field is very different, even with the same matching terms. > The reason is that the 'queryNorm' value is very different because the > 'sumOfSquaredWeights' is very different. Why is this? > > First query: +(+contents:sales +contents:representative) +literals:jb$1 > Explanation: > 32.274593 sum of: > 32.274593 sum of: > 10.336284 weight(contents:sales in 14578), product of: > 0.54963183 queryWeight(contents:sales), product of: > 2.6595461 idf(contents: sales=83179) > 0.20666377 queryNorm > 18.805832 fieldWeight(contents:sales in 14578), product of: > 7.071068 btq, product of: > 1.4142135 tf(phraseFreq=3.0) > 5.0 scorePayload(...) > 2.6595461 idf(contents: sales=83179) > 1.0 fieldNorm(field=contents, doc=14578) > 21.93831 weight(contents:representative in 14578), product of: > 0.8007395 queryWeight(contents:representative), product of: > 3.8746004 idf(contents: representative=24678) > 0.20666377 queryNorm > 27.397562 fieldWeight(contents:representative in 14578), product of: > 7.071068 btq, product of: > 1.4142135 tf(phraseFreq=2.0) > 5.0 scorePayload(...) > 3.8746004 idf(contents: representative=24678) > 1.0 fieldNorm(field=contents, doc=14578) > 0.0 weight(literals:jb$1 in 14578), product of: > 0.23816177 queryWeight(literals:jb$1), product of: > 1.1524118 idf(docFreq=375455, numDocs=436917) > 0.20666377 queryNorm > 0.0 fieldWeight(literals:jb$1 in 14578), product of: > 1.0 tf(termFreq(literals:jb$1)=1) > 1.1524118 idf(docFreq=375455, numDocs=436917) > 0.0 fieldNorm(field=literals, doc=14578) > > > Second query: +(+contents:sales +contents:representative) +(literals:jb$1 > literals:jb$9999) > Explanation: > 10.550879 sum of: > 10.550879 sum of: > 3.3790317 weight(contents:sales in 14578), product of: > 0.17967999 queryWeight(contents:sales), product of: > 2.6595461 idf(contents: sales=83179) > 0.0675604 queryNorm > 18.805832 fieldWeight(contents:sales in 14578), product of: > 7.071068 btq, product of: > 1.4142135 tf(phraseFreq=3.0) > 5.0 scorePayload(...) > 2.6595461 idf(contents: sales=83179) > 1.0 fieldNorm(field=contents, doc=14578) > 7.171847 weight(contents:representative in 14578), product of: > 0.26176953 queryWeight(contents:representative), product of: > 3.8746004 idf(contents: representative=24678) > 0.0675604 queryNorm > 27.397562 fieldWeight(contents:representative in 14578), product of: > 7.071068 btq, product of: > 1.4142135 tf(phraseFreq=2.0) > 5.0 scorePayload(...) > 3.8746004 idf(contents: representative=24678) > 1.0 fieldNorm(field=contents, doc=14578) > 0.0 product of: > 0.0 sum of: > 0.0 weight(literals:jb$1 in 14578), product of: > 0.0778574 queryWeight(literals:jb$1), product of: > 1.1524118 idf(docFreq=375455, numDocs=436917) > 0.0675604 queryNorm > 0.0 fieldWeight(literals:jb$1 in 14578), product of: > 1.0 tf(termFreq(literals:jb$1)=1) > 1.1524118 idf(docFreq=375455, numDocs=436917) > 0.0 fieldNorm(field=literals, doc=14578) > 0.5 coord(1/2) > > > > > > Peter >
