Well, assuming that token_count is an indexed field in your documents (i.e. not something you're computing on the fly), just use a RangeQuery for the numeric part. Actually, you probably want to use ConstantScoreRangeQuery...
The only thing you have to watch is that Lucene does a lexical compare, so you have to index your numbers as comparable strings, probably left-padding to some fixed width with zeros, see NumberTools. Best Erick On Thu, Oct 23, 2008 at 8:27 AM, Niels Ott <[EMAIL PROTECTED]>wrote: > Hi everybody, > > I need to query for documents not only for search terms but also for > numeric values (or other general types). Let me try to explain with a > hypothetical example. > > Assuming there is a value for the number words in each document (or the > number of person names, or whatever), I would want to formulate a query > like "Give me documents containing 'jack johnson' AND with token_count > > 250". > > I've been working with Lucene before and the keyword part is easy, but > what would be a good solution to query for numbers etc.? > > One first idea I had was storing the numbers (which are basically a > HashMap<String,Double>) in the index in some way or the other. But it is > not at all obvious for me how to query them then. > > Another thing I could think of would be using a separate database of any > type, but then how to bring those two together in a way that makes sense? > > Any pointers to useful resources and any types of hints are welcome! :-) > > Best, > > Niels > > > -- > Niels Ott > Computational Linguist (B.A.) > http://www.drni.de/niels/ > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > >
