Hi, Karl, Looking at the Lucene 1.2 source code, looks to me that the MultiFieldQueryParser generates a BooleanQuery. Each sub-query with the BooleanQuery is for one field. The actually calculation of the scoring is with BooleanScorer.java, where the scores from each sub-query is accumulated.
So, without going into more details of the BooleanScorer.java, it seems to me that the Lucene 1.2 creates a score from each field that is involved, and then, calculate a combined score (simple summation of the scores from each field). I like the simplicity with Lucene 1.2, and am considering porting the compound file format back to Lucene 1.2 so it will be more robust. Cheers, Jian On 11/13/05, Karl Koch <[EMAIL PROTECTED]> wrote: > > Hello all, > > I have a question about searching within multiple fields. I have the > following code for doing that (searchFields provides two fields in which I > want to search): > > IndexSearcher searcher = new IndexSearcher(indexDirectory); > // search over multiple index fields > Query query = MultiFieldQueryParser.parse(queryString, searchFields, > analyser); > hits = searcher.search(query); > > I am wondering how this is done internally (I am using Lucene 1.2). Does > Lucene 1.2 merge the terms of the two fields and create a single score > from > this? Or does Lucene 1.2 create a score from each field that is involved > and > then calculate a combined score from all those? > > Karl > > -- > Telefonieren Sie schon oder sparen Sie noch? > NEU: GMX Phone_Flat http://www.gmx.net/de/go/telefonie > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
