it may work. but will it be very slow and I want to score function like 1/(1+pos)，SpanFirst seems give the save score.
2010/6/5 Erik Hatcher <[email protected]>: > That's why I recommended building a boolean OR'd query out of this. The > normal query OR the phrase query OR the span first query. > > Erik > > > On Jun 4, 2010, at 11:52 AM, Li Li wrote: > >> thank you. But I don't think SpanFirst query is my need. Because I >> want to get all documents that contains any term. But give the one >> whose position is top a boost. The same is term's relative posistions. >> e.g. >> doc1 apache lucene is a open source project >> doc2 apache is a http server and many many other words ... >> lucene ... >> if user searchs apache lucene, I want both the docs are presented to >> user. But doc1 gets a higher score. I don't want to use a phrase query >> because it's slow(compare to boolean query) and set slop to 10000 >> seems strange. >> e.g. >> doc1 some other text ... apache lucene >> is a open source project >> doc2 apache lucene is a open source project some other text >> >> SpanFirstQuery is not my need. if user search apache, I want to show >> both docs but give higher score to doc2 because the matched terms' >> position less than doc1. If I use SpanFirstQuery SpanFirstQuery sfq = >> new SpanFirstQuery(apache, 100); I will fail to find docs which >> contains apache whose position is larger than 100. >> >> >> 2010/6/4 Erik Hatcher <[email protected]>: >>> >>> This is perhaps best discussed on the java-user list instead. Here's >>> some >>> thoughts... >>> >>> On Jun 4, 2010, at 2:36 AM, Li Li wrote: >>> >>>> hi all, >>>> I want to implement a query that taking position and terms' >>>> relative positions into consideration. It only supports multiterm >>>> queries like boolean or query. >>>> But I want to consider term postion and terms relative positions. >>>> e.g. there are two docs >>>> doc1 apache lucene is a open source project >>>> doc2 apache is a http server and lucene ... >>>> if user search "apache lucene" doc1 will win because apache lucene >>>> appear closer than doc2 >>> >>> A PhraseQuery will do that. It's common-place to OR in a (sloppy) phrase >>> query for the users query in order to get proximity to boost things. No >>> custom query needed to accomplish this. >>> >>>> e.g. >>>> doc1 some other text apache lucene is a open source project >>>> doc2 apache lucene is a open source project some other text >>>> doc2 wins because "apache lucene" appear at the first position >>> >>> And here, SpanFirstQuery is your friend. So OR'ing a PhraseQuery and a >>> SpanFirstQuery (with nested SpanNearQuery, or whatever is appropriate) >>> seems >>> to accomplish your goals. >>> >>> Give those a try and report back if things still aren't quite what you're >>> after. >>> >>> Erik >>> >>> >>> --------------------------------------------------------------------- >>> 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] >> > > > --------------------------------------------------------------------- > 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]
