Termdocs question

On Fri, Jun 20, 2008 at 12:12 PM, Vinicius Carvalho wrote:

Hello there! I trying to query for a specific document on a efficient way.
My index is structured in a way where I have an id field which is a unique
key for the whole index. When I'm updating/removing a document I was
searching for my id using a Searcher and a TermQuery. But reading the list
it seems that its a bit of overhead, using a reader.termDocs(term) would be
faster.

Here's a piece of code:

private void deleteFromIndex(String id){
Term term = new Term("id",id);
IndexReader reader = readerManager.getIndexReader();
TermDocs termDocs = null;
try {
termDocs = reader.termDocs(term);
while(termDocs.next()){
int index = termDocs.doc();
if(reader.document(index).get("id").equals(id)){
reader.deleteDocument(index);
}
}
} catch (IOException e) {
e.printStackTrace();
}finally{
if(termDocs != null){
try {
termDocs.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}

problem is, reader is not returning any term. When I switch to query it
works. My documents have all being indexed using BrazilianAnalyzer, don't
know if that could be the reason.

Regards

--
"In a world without fences and walls, who needs Gates and Windows?"

20 jun 2008 kl. 18.12 skrev Vinicius Carvalho:


Hello there! I trying to query for a specific document on a
efficient way.
Hi Vinicius,
termDocs = reader.termDocs(term);
while(termDocs.next()){
int index = termDocs.doc();
if(reader.document(index).get("id").equals(id)){
reader.deleteDocument(index);
}
}

On Sat, Jun 21, 2008 at 2:08 PM, Karl Wettin wrote:


20 jun 2008 kl. 18.12 skrev Vinicius Carvalho:


Hello there! I trying to query for a specific document on a efficient way.
Hi Vinicius,

termDocs = reader.termDocs(term);
Iterating documents and string comparing stored values is not very
efficient. Use a query instead, something like this:

BooleanQuery query = new BooleanQuery();
query.add(new TermQuery(term), Occurs.MUST);
query.add(new TermQuery(new Term("id", id), Occurs.MUST);
searcher.search(query, new HitCollector() {
public void collect(int doc, float score) {
reader.deleteDocument(doc);
}
});


karl

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