yes its ANDing them. Doing the query 'software engineer', 'software OR
engineer', 'software AND engineer' all return the same results. the
generated queries for them respectively are '(field:software
field:engineer)', '(field:software field:engineer)' and
'(+field:software +field:engineer)'. I do set the default operator to
AND and i'm using the MultiFieldQueryParser if that makes a difference
(it was doing the same thing with the QueryParser as well).
Chris Salem
440.946.5214 x5458
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
------
If you keep the exchange on the list you'll get the benefit of someone
smarter and more experienced than me stepping in.
See if the following code does not convince you that it works
correctly. I am using Lucene 2.0. Maybe there is a bug in an earlier
version, but I doubt it:
import java.io.IOException;
import java.util.Date;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.WhitespaceAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.queryParser.QueryParser.Operator;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.RAMDirectory;
public class TestWildCardFilter {
private static RAMDirectory directory;
private static Analyzer analyzer;
public static void main(String[] args) {
setupIndex();
try {
search("coconut stone");
search("coconut OR stone");
search("coconut AND stone");
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private static void setupIndex() {
directory = new RAMDirectory();
analyzer = new WhitespaceAnalyzer();
IndexWriter writer;
try {
writer = new IndexWriter(directory, analyzer, true);
Document doc = new Document();
doc.add(new Field("allFields",
"levely bunch of coconuts",
Field.Store.NO, Field.Index.TOKENIZED));
writer.addDocument(doc);
doc = new Document();
doc.add(new Field("allFields", "crazy rolling stone",
Field.Store.NO, Field.Index.TOKENIZED));
writer.addDocument(doc);
doc = new Document();
doc.add(new Field("allFields", "rolling stone done in by
coconut",
Field.Store.NO, Field.Index.TOKENIZED));
writer.addDocument(doc);
writer.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static int search(String q) throws Exception {
IndexSearcher is = new IndexSearcher(directory);
QueryParser qp = new QueryParser("allFields", analyzer);
qp.setDefaultOperator(Operator.AND);
Query query = qp.parse(q);
long start = new Date().getTime();
Hits hits = is.search(query);
long end = new Date().getTime();
System.err.println("\nquery: " + query.toString());
System.err.println("Found " + hits.length() + " document(s) (in " +
(end - start) + " milliseconds) that matched query '" + q +
"':");
return hits.length();
}
}
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