Slightly off topic to this thread, but how would adding different fields
with the same name deal with boosts? I've looked at the javadoc and FAQ,
but I think it's not a common use of this feature, any insight?
There is only one boost per field name. However, the effect is the multiplication of them all interestingly. So, in your example below, the boost of the "fieldName" is 2.
Erik
E.G. Document doc = new Document(); Field f1 = Field.Keyword("fieldName", "foo"); f1.setBoost(1); doc.add(f1);
Field f2 = Field.Keyword("fieldName", "bar"); f2.setBoost(2); doc.add(f2);
Cheers, sv
On Fri, 27 Feb 2004, Doug Cutting wrote:
I think it's document.add(). Fields are pushed onto the front, rather than added to the end.
Doug
Roy Klein wrote:I think it's got something to do with Document.invertDocument().
When I reverse the words in the phrase, the other document matches the
phrase query.
Roy
-----Original Message----- From: Erik Hatcher [mailto:[EMAIL PROTECTED] Sent: Friday, February 27, 2004 4:34 PM To: Lucene Users List Subject: Re: Indexing multiple instances of the same field for each document
On Feb 27, 2004, at 4:10 PM, Roy Klein wrote:
Hi Erik,
While you might be right in this example (using Field.Keyword), I can
see how this would still be a problem in other cases. For instance, if
I were adding more than one word at a time in the example I attached.
I concur that it appears to be a bug. It is unlikely folks use Lucene
like this too much though - there probably are not too many scenarios
where combining things into a single String or Reader is a burden.
I'm interested to know where in the code this oddity occurs so I can understand it more. I did a brief bit of troubleshooting but haven't figured it out yet. Something in DocumentWriter I presume.
Erik
Roy
-----Original Message----- From: Erik Hatcher [mailto:[EMAIL PROTECTED] Sent: Friday, February 27, 2004 2:12 PM To: Lucene Users List Subject: Re: Indexing multiple instances of the same field for each document
Roy,
On Feb 27, 2004, at 12:12 PM, Roy Klein wrote:
Document doc = new Document(); doc.add(Field.Text("contents", "the"));
Changing these to Field.Keyword gets it to work. I'm delving a little
bit to understand why, but it seems if you are adding words individually anyway you'd want them to be untokenized, right?
Erik
doc.add(Field.Text("contents", "quick")); doc.add(Field.Text("contents", "brown")); doc.add(Field.Text("contents", "fox")); doc.add(Field.Text("contents", "jumped")); doc.add(Field.Text("contents", "over")); doc.add(Field.Text("contents", "the")); doc.add(Field.Text("contents", "lazy")); doc.add(Field.Text("contents", "dogs")); doc.add(Field.Keyword("docnumber", "1")); writer.addDocument(doc); doc = new Document(); doc.add(Field.Text("contents", "the quick brown fox jumped over the lazy dogs")); doc.add(Field.Keyword("docnumber", "2")); writer.addDocument(doc); writer.close(); }
public static void query(File indexDir) throws IOException { Query query = null; PhraseQuery pquery = new PhraseQuery(); Hits hits = null;
try { query = QueryParser.parse("quick brown", "contents", new StandardAnalyzer()); } catch (Exception qe) {System.out.println(qe.toString());} if (query == null) return; System.out.println("Query: " + query.toString()); IndexReader reader = IndexReader.open(indexDir); IndexSearcher searcher = new IndexSearcher(reader);
hits = searcher.search(query); System.out.println("Hits: " + hits.length());
for (int i = 0; i < hits.length(); i++) { System.out.println( hits.doc(i).get("docnumber") + " "); }
pquery.add(new Term("contents", "quick")); pquery.add(new Term("contents", "brown")); System.out.println("PQuery: " + pquery.toString()); hits = searcher.search(pquery); System.out.println("Phrase Hits: " + hits.length()); for (int i = 0; i < hits.length(); i++) { System.out.println( hits.doc(i).get("docnumber") + " "); }
searcher.close(); reader.close();
} public static void main(String[] args) throws Exception { if (args.length != 1) { throw new Exception("Usage: " + test.class.getName() + " <index dir>"); } File indexDir = new File(args[0]); test(indexDir); query(indexDir); } }
------------------------------------------------------------------- --
-
-
-
-------
My results:
Query: contents:quick contents:brown
Hits: 2
1
2
PQuery:
contents:"quick brown"
Phrase Hits: 1
2
------------------------------------------------------------------- --
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-------------------------------------------------------------------- -
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
-------------------------------------------------------------------- -
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
--------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
--------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
--------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
--------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
--------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
