Most of what I've gleaned has come off the users list, but then I've been monitoring it for several years. You can search all the back posts here: http://www.lucidimagination.com/search/?q=#/p:lucene,solr
<http://www.lucidimagination.com/search/?q=#/p:lucene,solr>for instance searching wildcard AND ngram produces some interesting stuff... Best Erick On Thu, May 6, 2010 at 9:45 AM, Felix Pendergast <felixpenderg...@gmail.com>wrote: > Thank you, Erick. > Where can I find more information about the *term* queries and how to solve > them? It might come up in the future. Are there blogs, or books, or > something? > Thanks, > Felix > > 2010/5/6 Erick Erickson <erickerick...@gmail.com> > > > There's really no connection between NGrams and *. NGrams can be used > > to handle hairy wildcard expressions, in particular searching for things > > like > > *blah* is one potential use of NGrams. > > > > But your problem is simple to solve without bothering with NGrams, just > use > > the "begin*" syntax, no special indexing required... > > > > A bunch of work has been done to make wildcard queries more friendly, but > > do note that this is a more complex problem than you might initially > think, > > so > > don't be surprised if you revisit your solution as your project > matures... > > > > HTH > > Erick > > > > On Thu, May 6, 2010 at 8:11 AM, Felix Pendergast > > <felixpenderg...@gmail.com>wrote: > > > > > Hello, > > > > > > I'm trying to search for partial beginning matches on a big list of > > > lastnames. So Wein* should find Weinberg, Weinkamm etc. > > > > > > I could do this by creating a special field, and adding > > > <filter class="solr.EdgeNGramFilterFactory" minGramSize="1" > > > maxGramSize="50" preserveOriginal="1"/> > > > to its type specification in schema.xml. When I add the line above only > > to > > > the indexing analyzer and leave it empty for the query analyzer, I can > > then > > > search by just search special_field:Wein and get the expected results. > > > > > > Now I see that solr also has a *-syntax. What's the connection between > > > EdgeNGramFilterFactory and the *-syntax? > > > > > > Am I doing things correctly or is there a better, more regular way? > > > > > > Thanks, > > > Felix > > > > > >
