Thanks for the information Chris, but I don't see a reference to ConstantScoreQuery or ConstanctScoreRangeQuery in the 1.4.3 Lucene jar. Perhaps I'm not looking in the right place?
import org.apache.lucene.search.ConstantScoreQuery; import org.apache.lucene.search.ConstantScoreRangeQuery; Tom -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Chris Hostetter Sent: Monday, January 30, 2006 5:24 PM To: java-user@lucene.apache.org Subject: Re: Number Searches vs Character PrefixQuery is implimented as a BooleanQuery using term expansion. what that means is that a prefix query on a common prefix is much more expensive then a prefix query on a less common prefix. not just in terms of hte number of documents that match, but because of the number of terms that match the prefix. assuming "pq" is your PrefixQuery object, take a look at the output of calling pq.rewrite(yourReader).toString() and compare the difference between your 12* and your de* queries ... i'm guessing you'll find that the 12* approach is a lot bigger. if you poke arround you'll find mention of a ConstanctScoreRangeQuery ... using the ideas from that, you can impliment a much faster version of PrefixQuery that doesn't score documents based on term frequency ... which may be ok depending on your needs. : Date: Mon, 30 Jan 2006 13:51:15 -0500 : From: "Aigner, Thomas" <[EMAIL PROTECTED]> : Reply-To: java-user@lucene.apache.org : To: java-user@lucene.apache.org : Subject: Number Searches vs Character : : : I am curious what would be the difference between searching for a number : verses a character. : : I have a large index consisting of a few fields (So index would look : something like: " 123123123 my description my catalog" : : Searching for 12* is much slower than searching for de* : I don't have any issues searching for 3 or more characters.. just 1 or 2 : and the wildcard. : Stored this way: doc.add(Field.Text("allindex", all,true)); : Using 1.4.3 : : Any reason why that would be and how I can help speed that up? : : --------------------------------------------------------------------- : To unsubscribe, e-mail: [EMAIL PROTECTED] : For additional commands, e-mail: [EMAIL PROTECTED] : -Hoss --------------------------------------------------------------------- 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]
