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From Simon Willnauer <simon.willna...@googlemail.com>
Subject Re: Counting search results
Date Tue, 15 Sep 2009 12:36:42 GMT
Did you try:
int numDocs
TermDocs termDocs = reader.termDocs(new Term("myField", "myTerm"));
while (termDocs.next()) { numDocs++; }

simon

On Tue, Sep 15, 2009 at 2:19 PM, Mathias Bank <mathias.bank@gmail.com> wrote:
> Hello,
>
> I'm trying to find the number of documents for a specific term to
> create text statistics. I'm not interested in ordering the results or
> even recieving the first result. I just need the number of results.
>
> Currently, I'm trying to do this by using the lucene searcher class:
>
> IndexSearcher searcher = new IndexSearcher(reader);
> String queryString = fieldname+":" + term;
> QueryParser parser = new QueryParser(fieldname, new GermanAnalyzer());
> TopDocs d = searcher.search(parser.parse(queryString), filter, 1);
> int count = d.totalHits;
>
> The problem is, that there is a large index (optimized) with > 8 mio.
> entries. One search could return a large number of search results (> 1
> mio). Currently these search tasks take more than 15 secunds.
>
> The question is: is there any way to get the number of search results
> faster? I think, that it could be optimized by not using a Weight
> object (order is not interesting), but I haven't seen a way to do
> this.
>
> I hope, someone has already solved this problem.
>
> Mathias
>
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