I use Lucene 5.3 and try to search over multiple fields using the queryparser-syntax. I found within the Lucene Tutorials a short example and modified it to Version 5.3 and to search over those fields.
package lucenewriterexample;
import org.apache.lucene.analysis.standard.StandardAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.document.TextField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import org.apache.lucene.queryparser.classic.ParseException;
import org.apache.lucene.queryparser.classic.QueryParser;
import org.apache.lucene.search.IndexSearcher;
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 java.io.IOException;
public class LuceneWriterExample {
public static void main(String[] args) throws IOException, ParseException {
StandardAnalyzer analyzer = new StandardAnalyzer();
Directory index = new RAMDirectory();
IndexWriterConfig config = new IndexWriterConfig(analyzer);
try (IndexWriter writer = new IndexWriter(index, config)) {
addDoc(writer, "Day first : Lucence Introduction test.", "3436NRX");
addDoc(writer, "Day second , part one : Lucence Projects.", "3437RJ1");
addDoc(writer, "Day second , part two: Lucence Uses testing rr.", "3437RJ2");
addDoc(writer, "Day third : Lucence Demos.", "34338KRX");
}
String querystr = "title:(part) AND course_code:(3437RJ1)";
Query q = new QueryParser("title", analyzer).parse(querystr);
// 3. searching
int hitsPerPage = 10;
IndexReader reader = DirectoryReader.open(index);
IndexSearcher searcher = new IndexSearcher(reader);
TopScoreDocCollector collector = TopScoreDocCollector.create(hitsPerPage);
searcher.search(q, collector);
ScoreDoc[] hits = collector.topDocs().scoreDocs;
// 4. display results
System.out.println("Query string: " + querystr );
System.out.println("Found " + hits.length + " hits.");
for (int i = 0; i < hits.length; ++i) {
int docId = hits[i].doc;
Document d = searcher.doc(docId);
System.out.println((i + 1) + ". " + d.get("course_code") + "\t" + d.get("title"));
}
// Finally , close reader
}
private static void addDoc(IndexWriter w, String title, String courseCode) throws IOException {
Document doc = new Document();
doc.add(new TextField ("title", title, Field.Store.YES));
doc.add(new StringField("course_code", courseCode, Field.Store.YES));
w.addDocument(doc);
}
The queryparser is working for "title:part", then I get all documents containing "part", but if I use "title:(part) AND course_code:(3437RJ1)" or "title:(part) OR course_code:(3436NRX) the result is 0. Where is the mistake within the search?
I ran this and tried title:(part) OR course_code:(3436NRX), and I get 2 results, exactly as I would expect. Perhaps you meant you were expecting a third result matching the course_code, but didn't get it. If you really meant you actually got zero results with that query, I'm not sure what the problem is.
So, why aren't you able to get a match on course_code?
As is so often then case with lucene, you have mismatched analyzers. You queryparser is using StandardAnalyzer, but course_code is a StringField, and so it is not being analyzed at all. StandardAnalyzer includes a filter to lowercase everything, so the end result is you have a field that has 3436NRX, and a query for course_code:3436nrx.
Possible solutions would be:
TermQuery instead of the query parser for your StringFieldsTextFieldetc.