Hi All, I have a question regarding index time parameter Index.ANALYZED_NO_NORMS and Index.ANALYZED
As per the definition, ANALYZED_NO_NORMS is no different than ANALYZED option except that it does not store norm (boost) information in the index. So if I create 2 indexes: 1 with ANALYZED option and another with ANALYZED_NO_NORMS option, for the same indexed document and for the same search query both should bring same result with same matching percentile. But the percentile for the index created using NO_NORM is higher than the one created with NORM. Why is that so? Attached is the java example with 2 indexes created and the same document searched using BooleanQuery. The result indicates that though the matched documents are same, their percentiles differ? can some one pls help me understand norm better? is it because in the index with norm, lucene adds some boost for index fields? Result of running the program is: -------------------------------------------------------------------------------------------- Adding Doc to NORM Index :: author : author1 --------------------------------------- Adding Doc to NO NORM Index :: author : author1 ======================================= Adding Doc to NORM Index :: author : author2 --------------------------------------- Adding Doc to NO NORM Index :: author : author2 ======================================= Adding Doc to NORM Index :: author : author3 --------------------------------------- Adding Doc to NO NORM Index :: author : author3 ======================================= Adding Doc to NORM Index :: author : author4 --------------------------------------- Adding Doc to NO NORM Index :: author : author4 ======================================= Search for the book with Author: author1 NORM:: WITH NORM Query :: (author:author1) (subject:book subject:first subject:my) -isbn:123 Match: 19.738173% || Doc Author: author2 || Doc subject: My next book || Doc ISBN: 333 Match: 6.168179% || Doc Author: author3 || Doc subject: this first text || Doc ISBN: 444 Search for the book with Author: author1 NORM:: WITHOUT NORM Query :: (author:author1) (subject:book subject:first subject:my) -isbn:123 Match: 39.476345% || Doc Author: author2 || Doc subject: My next book || Doc ISBN: 333 Match: 9.869086% || Doc Author: author3 || Doc subject: this first text || Doc ISBN: 444 Thanks Saurabh
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