Just so that nobody is confused in the future, PrefixQuery that Dave is mentioning is actually a query that lets you make searches such as 'Consult*'.
See http://jguru.com/faq/view.jsp?EID=480194 Otis --- Dave Kor <[EMAIL PROTECTED]> wrote: > First character asterisk (eg, *ogleash) is performed by PrefixQuery, > which > executes much faster than WildcardQuery. > > > Dave Kor Kian Wei > Consultant > Product Engineering > NexusEdge Technologies Pte. Ltd. > 6 Aljunied Ave 3, #01-02 (Level 4) > Singapore 389932 > Tel : (+65)848-2552 > Fax : (+65)747-4536 > Web : www.nexusedge.com > > > -----Original Message----- > > From: Otis Gospodnetic [mailto:[EMAIL PROTECTED]] > > Sent: Friday, January 11, 2002 11:40 AM > > To: Lucene Users List > > Subject: Re: Limit on number of characters before wildcard? > > > > > > Hello, > > > > I haven't tested this like you did, but from looking at the query > > parser (QueryParser.jj file in the Lucene distribution) > > it seems that only a single character is required before '*' or > '?': > > > > ... > > | <WILDTERM: <_TERM_START_CHAR> > > (<_TERM_CHAR> | ( [ "*", "?" ] ))* > > > ... > > > > _TERM_START_CHAR is defined as: > > [ "a"-"z", "A"-"Z", "_", "\u0080"-"\uFFFE" ] > > > > and as you can see from the first definition above this character > can > > be followed by either zero or more _TERM_CHAR or "*" or "?". > > > > This also answers your question about using an asterisk as the very > > first character in the query. > > > > It would be great if Doug or Brian Goetz could confirm or dispute > this, > > so that I can add it to the Lucene FAQ at jGuru.com. > > > > Otis > > > > > > > > > > > > --- Aruna Raghavan <[EMAIL PROTECTED]> wrote: > > > Hi, > > > From some testing that I have done it appears that there is a > limit > > > of 3 > > > characters before the wild card for wildcard queries. In other > > words, > > > if the > > > word is dogleash and I looking by using do* it returns wrong > > results > > > (usually only a asubset) where as if I use dog*, I get correct > > > results. > > > > > > Also, wildcard at the begining of the keyword does not seem to be > > > supported. > > > (*ogleash) > > > Can some one confirm this? Is this documented anywhere? > > > > > > -- > > > To unsubscribe, e-mail: > > > <mailto:[EMAIL PROTECTED]> > > > For additional commands, e-mail: > > > <mailto:[EMAIL PROTECTED]> > > > > > > > > > __________________________________________________ > > Do You Yahoo!? > > Send FREE video emails in Yahoo! Mail! > > http://promo.yahoo.com/videomail/ > > > > -- > > To unsubscribe, e-mail: > > <mailto:[EMAIL PROTECTED]> > > For additional commands, e-mail: > > <mailto:[EMAIL PROTECTED]> > > > > > > > > > -- > To unsubscribe, e-mail: > <mailto:[EMAIL PROTECTED]> > For additional commands, e-mail: > <mailto:[EMAIL PROTECTED]> > __________________________________________________ Do You Yahoo!? Send FREE video emails in Yahoo! Mail! http://promo.yahoo.com/videomail/ -- To unsubscribe, e-mail: <mailto:[EMAIL PROTECTED]> For additional commands, e-mail: <mailto:[EMAIL PROTECTED]>
