Hi John,
Further to my question below, I did some back-to-basics investigation of
PhraseQueries and found that even basic ones fail for me...
I found the attached code on the Internet (see
http://affy.blogspot.com/2003/04/codebit-examples-for-all-of-lucenes.html)
and this fails too... Can you explain why? I would expect the first
test to deliver 2 hits.
I have tried with Lucene 2.0 and 2.3.2 jars and both fail.
Thanks again,
- Chris
Chris Bamford wrote:
Hi John,
Just continuing from an earlier question where I asked you how to
handle strings like "from:fred flintston*" (sorry I have lost the
original email).
You advised me to write my own BooleanQuery and add to it Prefix- /
Term- / Phrase- Querys as appropriate. I have done so, but am having
trouble with the result - my PhraseQueries just do not get any hits at
all :-(
My code looks for quotes - if it finds them, it treats the quoted
phrase as a PhraseQuery and sets the slop factor to 0.
so, an input of:
subject:"Good Morning"
results in a PhraseQuery (which I add to my BooleanQuery and then dump
with toString()) of:
+subject:"good morning"
... which fails.
However, if I break it into 2 TermQuerys, it works (but that's not
what I want).
What am I missing?
Thanks,
- Chris
---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--
------------------------------------------------------------------------
*Chris Bamford*
Senior Development Engineer <http://www.scalix.com>
------------------------------------------------------------------------
/Email / MSN/ [EMAIL PROTECTED]
/Tel/ +44 (0)1344 381814 /Skype/ c.bamford
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package Experimental;
import java.io.IOException;
import java.util.LinkedList;
import junit.framework.TestCase;
import org.apache.lucene.analysis.standard.*;
import org.apache.lucene.document.*;
import org.apache.lucene.index.*;
import org.apache.lucene.search.*;
import org.apache.lucene.store.*;
public class TestRunQueries extends TestCase {
public void testQueries() throws Exception {
RAMDirectory indexStore = new RAMDirectory();
Query query = null;
String docs[] = {
"aaa bbb ccc",
"aaa ddd eee",
"aaa ddd fff",
"aaa dee fff",
"AAA fff ggg",
"ggg hhh iii",
"123 123 1z2", // document containing z for
// WildcardQuery example.
"999 123 123", // document for fuzzy search.
"9x9 123 123", // document for fuzzy search.
"99 123 123", // document for fuzzy search.
"xxx yyy zzz"
};
IndexWriter writer = new IndexWriter(indexStore,
new StandardAnalyzer(), true);
for (int j = 0; j < docs.length; j++) {
Document d = new Document();
d.add(new Field("body", docs[j], Field.Store.YES, Field.Index.UN_TOKENIZED));
writer.addDocument(d);
}
writer.close();
IndexReader indexReader = IndexReader.open(indexStore);
System.out.println("\n****** PhraseQuery Example ******");
System.out.println("NOTE: 2 documents are found "
+ "with 'aaa ddd' in order.");
System.out.println("--------------"
+ "------------------------");
PhraseQuery pq = new PhraseQuery();
pq.add(new Term("body", "aaa"));
pq.add(new Term("body", "ddd"));
TestRunQueries.runQueryAndDisplayResults(indexStore, pq);
System.out.println("");
System.out.println("NOTE: ZERO documents are"
+ " found with 'xxx ddd' in order.");
System.out.println("-----------"
+ "---------------------------");
pq = new PhraseQuery();
pq.add(new Term("body", "xxx"));
pq.add(new Term("body", "ddd"));
TestRunQueries.runQueryAndDisplayResults(indexStore, pq);
}
public static void runQueryAndDisplayResults(Directory indexStore, Query q) throws IOException {
IndexSearcher searcher = new IndexSearcher(indexStore);
System.out.println("runQueryAndDisplayResults: query = " + q.toString());
Hits hits = searcher.search(q);
int _length = hits.length();
System.out.println("HITS: " + _length);
for (int i = 0; i < _length; i++) {
Document doc = hits.doc(i);
Field field = doc.getField("body");
System.out.println(" value: " + field.stringValue());
}
searcher.close();
}
}---------------------------------------------------------------------
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
