document « Field « Java Lucene Q&A

1. entity, document and fields corresponds to?    stackoverflow.com

when using solr i often come across these 3 words. what do they correspond to in a database. and while we are on it..does one create an xml file of the whole database ...

2. Best way to retrieve certain field of all documents returned by a lucen search    stackoverflow.com

I was wondering what the best way is to retrieve a certain field of all documents returned by a Searcher of Lucene. Background: each document has a date field (written on) and ...

3. Storing DateTime field in lucene document    stackoverflow.com

What is the best way to add datefield to a document (i just need YYYYMMDD) Whats the best way to query against datefield Im creating the datefield as the following

newDoc.Add(new Field("newsdate", "", Field.Store.YES, ...

4. how to get the stored field of a document by a document id in lucene?    stackoverflow.com

I am trying to combine lucene score with PageRank, I tried to modify the DefaulySimilarity to add the PageRank I already have(in a Array with corresponding URL), but the problem is ...

5. Find all Lucene documents having a certain field    stackoverflow.com

I want to find all documents in the index that have a certain field, regardless of the field's value. If at all possible using the query language, not the API. Is there ...

6. How can I read a Lucene document field tokens after they are analyzed?    stackoverflow.com

If I create a document and add a field that is both stored and analyzed, how can I then read this field back as a list of tokens? I have the ...

7. SOLR - How do I pull field values from documents when adding them to SOLR?    stackoverflow.com

Using SolrJ with SOLR 1.4.1. So I have a set of fields defined which I want to index on. Say I have a body of hundreds of documents (assume they're text ...

8. How do I get Average field length and Document length in Lucene?    stackoverflow.com

I am trying to implement BM25f scoring system on Lucene. I need to make a few minor changes to the original implementation given here for my needs, I got ...

9. How can I update document without losing fields?    stackoverflow.com

CommonsHttpSolrServer server = new CommonsHttpSolrServer("http://localhost:8983/solr/");
SolrInputDocument doc1 = new SolrInputDocument();
doc1.addField("id", "id1");
doc1.addField("name", "doc1");
doc1.addField("price", new Float(10));
SolrInputDocument doc2 = new SolrInputDocument();
doc2.addField("id", "id1");
doc2.addField("name", "doc2");

server.add(doc1);
server.add(doc2);
server.commit();

SolrQuery query = new SolrQuery();
query.setQuery("id:id1");
query.addSortField("price", SolrQuery.ORDER.desc);
QueryResponse rsp = server.query(query);
Iterator<SolrDocument> iter = rsp.getResults().iterator();
while(iter.hasNext()){
  ...