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From "Michael Wyraz (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-4049) PrefixQuery (or it's superclass MultiTermQuery) ignores index time boosts
Date Fri, 11 May 2012 20:16:49 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-4049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13273572#comment-13273572
] 

Michael Wyraz commented on LUCENE-4049:
---------------------------------------

Thank you, this solved the problem.
But I had to set it explicitely for PrefixQuery, so this is not the default there.
                
> PrefixQuery (or it's superclass MultiTermQuery) ignores index time boosts
> -------------------------------------------------------------------------
>
>                 Key: LUCENE-4049
>                 URL: https://issues.apache.org/jira/browse/LUCENE-4049
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: core/search
>    Affects Versions: 3.5, 3.6
>         Environment: Java
>            Reporter: Michael Wyraz
>
> It is possible to set boost to fields or documents during indexing, so certain documents
can be boostes over others. This works well with TermQuery or FuzzyQuery but not with PrefixQuery
which ignores the individual values.
> Test Code below:
> import java.io.IOException;
> import org.apache.lucene.analysis.standard.StandardAnalyzer;
> import org.apache.lucene.document.Document;
> import org.apache.lucene.document.Field;
> import org.apache.lucene.index.IndexReader;
> import org.apache.lucene.index.IndexWriter;
> import org.apache.lucene.index.IndexWriterConfig;
> import org.apache.lucene.index.Term;
> import org.apache.lucene.search.IndexSearcher;
> import org.apache.lucene.search.PrefixQuery;
> import org.apache.lucene.search.Query;
> import org.apache.lucene.search.ScoreDoc;
> import org.apache.lucene.search.TopScoreDocCollector;
> import org.apache.lucene.store.Directory;
> import org.apache.lucene.store.RAMDirectory;
> import org.apache.lucene.util.Version;
> import com.evermind.tools.calendar.StopWatch;
> public class LuceneTest
> {
>     public static void main(String[] args) throws Exception
>     {
>         Directory index=new RAMDirectory();
>         StandardAnalyzer analyzer=new StandardAnalyzer(Version.LUCENE_35);
>         IndexWriterConfig config=new IndexWriterConfig(Version.LUCENE_35, analyzer);
>         
>         IndexWriter w = new IndexWriter(index, config);
>         addDoc(w, "Hello 1",1);
>         addDoc(w, "Hello 2",2);
>         addDoc(w, "Hello 3",1);
>         w.close();
>         StopWatch.stop();
>         
>         IndexReader reader = IndexReader.open(index);
>         IndexSearcher searcher = new IndexSearcher(reader);
>         
> //        Query q = new TermQuery(new Term("f1","hello"));
>         Query q = new PrefixQuery(new Term("f1","hello"));
>         
>         TopScoreDocCollector collector = TopScoreDocCollector.create(10, true);
>         searcher.search(q, collector);
>         for (ScoreDoc hit: collector.topDocs().scoreDocs)
>         {
>             Document d = searcher.doc(hit.doc);
>             System.err.println(d.get("f1")+" "+hit.score+" "+hit.doc);
>         }
>     }
>     
>     private static void addDoc(IndexWriter w, String value, float boost) throws IOException
>     {
>         Document doc = new Document();
>         doc.add(new Field("f1", value, Field.Store.YES, Field.Index.ANALYZED));
>         doc.setBoost(boost);
>         w.addDocument(doc);
>     }
> }

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