The unsatisfactory answer is "because that's the way it works". I suspect that the underlying issue is what happens when you try to expand phrase searches via wildcards. Wildcard searches are already plagued by "TooManyClauses" exceptions, which would only get worse with phrases In fact, downright impossible.
You'd have to find all the wildcards that matched. Then find all the words that were one position less. Then form a huge OR query of all these phrases. Which would be really ugly. And that's only a single wildcard in a phrase. Imagine trying to form the query of "a* b* c*". The OR clause would be the cross product of all terms that started with one of the three letters. You could possibly trim that down by finding the offsets in each document for all the terms that began with any of the three letters and "restricting" the massive OR query by the term positions of each word in each document and then forming them into a huge query.... But you see where this is going. To do any of this is prohibitively expensive. Take all this with a grain of salt since I haven't been in the guts of the Lucene search engine, but I suspect that the very bright folks who've coded this whole thing up would have done this long ago if it was reasonable. Best Erick 2008/9/15 M. Fatih Soydan <[EMAIL PROTECTED]> > I read. But i didn't understand why not ? > > 15 Eylül 2008 Pazartesi 16:56 tarihinde Erick Erickson > <[EMAIL PROTECTED]> yazdı: > > wildcards are NOT supported within double quotes, so if > > you are submitting your query > > "Technology Gunlugu*" > > WITH the double quotes, you are searching for > > that literal phrase. > > > > Best > > Erick > > > > P.S. See: > > > > http://lucene.apache.org/java/docs/queryparsersyntax.html > > the first line under "wildcard searches" > > > > > > 2008/9/15 Fatih Soydan <[EMAIL PROTECTED]> > > > >> Hi; > >> > >> > >> > >> I am trying to write an application that's working on Blackberry or > other > >> java enabled phones. This application talk with the server and Ask some > >> questions. Server Side is c# and i am using Apache Lucene.Net in this > >> Project. > >> > >> > >> > >> I searched a forum or mail list, but i didn't found yet. I have a > problem > >> about query syntax. > >> > >> > >> > >> I want to search this > >> > >> "Technology Gunlugu*" AND "NTV" > >> > >> > >> > >> But don't returns any result, Because of "technology gunlugu*". > >> > >> When I searched > >> > >> "Technology Gunlugu" AND "NTV" returns 3 matched record > >> > >> "Technology Gunlugunde" AND "NTV" returns 1 matched record > >> > >> > >> > >> > >> > >> I debug my Project step by step. > >> > >> > >> > >> In the Lucene.Net.Search.IndexSearcher > >> > >> public override Query Rewrite(Query original) > >> > >> { > >> > >> Query query = original; > >> > >> for (Query rewrittenQuery = query.Rewrite(reader); rewrittenQuery != > query; > >> rewrittenQuery = query.Rewrite(reader)) > >> > >> { > >> > >> query = rewrittenQuery; > >> > >> } > >> > >> return query; > >> > >> } > >> > >> > >> > >> İf the query is a PrefixQuery Gunlugu* turns to Gunlugunde OR Gunlugu > >> > >> But if the query is a default Query (Lucene.Net.Search.Query) > "technology > >> gunlugu*" it returns null query. > >> > >> > >> > >> > >> > >> What can I do ? > >> > >> > >> > >> (Sorry for my bad English) > >> > >> > >> > >> FATIH SOYDAN > >> > >> > >> > >> > > >
