Hi, if you pass in a precisionStep != theDefault (which is 4), you also have to pass the same precStep also into the NumericRangeQuery / NumericRangeFilter. If you not do this, you may get too few / incorrect results. This is explained in JavaDocs of NumericRangeQuery. You example does not do this.
Uwe ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Tarr, Gregory [mailto:gregory.t...@detica.com] > Sent: Thursday, June 09, 2011 11:26 AM > To: java-user@lucene.apache.org > Subject: Multi value NumericFields - major issue > > The javadocs for NumericField (lucene 2.9.4) state: > > You may add the same field name as a NumericField to the same document > more than once. Range querying and filtering will be the logical OR of all > values; so a range query will hit all documents that have at least one value in > the range > > Furthermore, the precisionStep is defined only in terms of performance and > disk space, not in terms of affecting the results. > > However, the unit test below shows that the precisionStep directly affects > the results when using multi-value fields: > > Analyzer analyzer = new StandardAnalyzer(Version.LUCENE_29); > RAMDirectory directory = new RAMDirectory(); IndexWriter writer = new > IndexWriter(directory, analyzer, true, > IndexWriter.MaxFieldLength.UNLIMITED); > Document document = new Document(); > document.add(new NumericField("number", 4, Field.Store.YES, > true).setLongValue(480)); document.add(new NumericField("number", 4, > Field.Store.YES, true).setLongValue(180)); writer.addDocument(document); > IndexSearcher searcher = new IndexSearcher(directory, true); Query q = > new FilteredQuery(new MatchAllDocsQuery(), > NumericRangeFilter.newLongRange("number", 444l, 10000l, true, true)); > TopDocs docs = searcher.search(q, null, 10); Assert.assertEquals(1, > docs.totalHits); > > analyzer = new StandardAnalyzer(Version.LUCENE_29); > directory = new RAMDirectory(); > writer = new IndexWriter(directory, analyzer, true, > IndexWriter.MaxFieldLength.UNLIMITED); > document = new Document(); > document.add(new NumericField("number", 6, Field.Store.YES, > true).setLongValue(480)); document.add(new NumericField("number", 6, > Field.Store.YES, true).setLongValue(180)); writer.addDocument(document); > searcher = new IndexSearcher(directory, true); q = new FilteredQuery(new > MatchAllDocsQuery(), NumericRangeFilter.newLongRange("number", 444l, > 10000l, true, true)); docs = searcher.search(q, null, 10); Assert.assertEquals(1, > docs.totalHits); // fails, due to increased precision Step > > Any help would be greatly appreciated > > Greg > > Please consider the environment before printing this email. > > This message should be regarded as confidential. If you have received this > email in error please notify the sender and destroy it immediately. > > Statements of intent shall only become binding when confirmed in hard copy > by an authorised signatory. The contents of this email may relate to dealings > with other companies under the control of Detica Limited, details of which > can be found at http://www.detica.com/statutory-information. > > Detica Limited is registered in England under No: 1337451. > Registered offices: Surrey Research Park, Guildford, Surrey, GU2 7YP, > England. --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
