Hi Erik, > SpanFirstQuery is what you're after.
thanks for this hint (@Erick: thanks for the good explanation of my prob), I read the chapter for the spanfirstquery in LIA, but what I don't understand is, how do i have to do a "Phrase" SpanFirstQuery? I found a message with example code ( http://www.nabble.com/Speedup-indexing-process-tf1140025.html#a3034612 ): here's my jruby snippet: SpanFirstQuery = org.apache.lucene.search.spans.SpanFirstQuery SpanTermQuery = org.apache.lucene.search.spans.SpanTermQuery Term = org.apache.lucene.index.Term sp = SpanFirstQuery.new(SpanTermQuery.new(Term.new("TI",search)),2) hits = searcher.search(sp) for i in 0...hits.length puts hits.doc(i).getField("kurz") end I get no results for "action and" (there are some docs with beginning with "action and" in the title) but i get (correct) results for "action", What am I doing wrong here? tia, martin > > Erik > > > On Nov 14, 2006, at 8:32 AM, Martin Braun wrote: > >> hi, >> >> i would like to provide a exact "PrefixField Search", i.e. a search for >> exactly the first words in a field. >> I think I can't use a PrefixQuery because it would find also substrings >> inside the field, e.g. >> action* would find titles like "Action and knowledge" but also (that's >> what i don't want it to find) >> "Lucene in Action" >> >> As a regex it would be sth. like /^Action and.*/ >> >> Now the question for me is how to implement this functionality, I see to >> ways: >> >> 1) Some kind of TermEnum over all Docs (or the prefixquery results?) and >> string comparison >> 2) Using the regex contribution >> 3) a super -fast lucene function I have overseen :) >> >> with 2) I am worrying about performance, anybody have experiences with >> regex-queries? >> >> .. but same for 1) anybody already impolemented this already and could >> give some code samples / hints ? >> >> tia, >> >> >> martin >> >> >> >> >> >> --------------------------------------------------------------------- >> 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] > -- Universitaetsbibliothek Heidelberg Tel: +49 6221 54-2580 Ploeck 107-109, D-69117 Heidelberg Fax: +49 6221 54-2623 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
