Thanks Erick you've helped a lot and so has everyone else. -----Original Message----- From: Erick Erickson [mailto:[EMAIL PROTECTED] Sent: 22 February 2007 13:00 To: java-user@lucene.apache.org Subject: Re: Returning only a small set of results
See TopDocs, HitCollector, etc. You'll have to dig through the documentation and try a few experiments to make sense of it all, one sentence explanations aren't much help. But think of Hits as a convenience class for getting the best-scoring 100 documents and use the other classes if you want to get *all* the documents. Don't go to the other classes unless you start getting performance problems with Hits. The main take-away from Hits is that it'll re-execute the query every 100 documents you read from it or so, so the only time you care is when you find yourself assembling large numbers of documents... Erick On 2/22/07, Kainth, Sachin <[EMAIL PROTECTED]> wrote: > > What can you use in place of Hits and how do they differ? > > -----Original Message----- > From: Chris Hostetter [mailto:[EMAIL PROTECTED] > Sent: 21 February 2007 22:43 > To: java-user@lucene.apache.org > Subject: Re: Returning only a small set of results > > : A question about efficiency and the internal workings of the Hits > class. > : When we make a call to IndexSearcher's search method thus: > : > : Hits hits = searcher.Search(query); > : > : Do we actually, physically get back all the results of the query > even if > : there are 20 million results or for efficiency do we physically get > back > > the Hits class fetches back the first N result documents (where N is > 100 i > think) and then it fetches more and more as needed if you ask for more. > generally speaking Hits works fine for simple pagination applications, > but if you are intented on walking deep down the list of ordred > results, i would avoid it. > > > -Hoss > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > > > This message has been scanned for viruses by MailControl - (see > http://bluepages.wsatkins.co.uk/?6875772) > > > This email and any attached files are confidential and copyright > protected. If you are not the addressee, any dissemination of this > communication is strictly prohibited. Unless otherwise expressly > agreed in writing, nothing stated in this communication shall be legally binding. > > The ultimate parent company of the Atkins Group is WS Atkins plc. > Registered in England No. 1885586. Registered Office Woodcote Grove, > Ashley Road, Epsom, Surrey KT18 5BW. > > Consider the environment. Please don't print this e-mail unless you > really need to. > > --------------------------------------------------------------------- > 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]
