Hi Aditi, In that case I could suggest you to just index the domain name seperately as well i.e. index the following fields : email adddess, domain name; instead of just email address. When I said reverse the tokens, you could reverse the tokens while indexing(just flipping the text string while indexing) and search for reverse string while searching. Eric might have a better solution though ! :) Let me know if that solves the issue. -- Anshum Gupta Naukri Labs! http://ai-cafe.blogspot.com
The facts expressed here belong to everybody, the opinions to me. The distinction is yours to draw............ On Thu, Oct 30, 2008 at 12:13 PM, Aditi Goyal <[EMAIL PROTECTED]>wrote: > Thanks Anshum and Eric. > > Well, I was looking for something like searching by domain name in the > email > address etc. > How can I reverse the tokens? Can you please explain in little detail? > > Thanks, > Aditi > > On Thu, Oct 30, 2008 at 10:58 AM, Anshum <[EMAIL PROTECTED]> wrote: > > > Hi Aditi, > > As Eric mentioned, we'd need to know more to provide a rather apt > solution. > > At the same time, a prefix wildcard is a highly unoptimized thing for > > lucene > > because of the way the index is stored/read. Ideally you'd atleast want > to > > reverse the tokens as already mentioned. > > This is because the index terms are lexically sorted while storing and so > > the seem/fetch is efficient under normal cases(and not under the case of > a > > prefix wildcard). > > > > -- > > Anshum Gupta > > Naukri Labs! > > http://ai-cafe.blogspot.com > > > > The facts expressed here belong to everybody, the opinions to me. The > > distinction is yours to draw............ > > > > > > On Wed, Oct 29, 2008 at 6:04 PM, Erick Erickson <[EMAIL PROTECTED] > > >wrote: > > > > > Sure, there are many tricks. If you search the mail archives you'll > > > find a bunch of them. > > > > > > One would be to reverse the tokens and make your leading > > > wildcard queries into trailing ones on the reversed field. > > > > > > But without more details about what you're trying to accomplish, > > > there's not much really useful advice we can offer. > > > > > > Best > > > Erick > > > > > > On Wed, Oct 29, 2008 at 7:15 AM, Aditi Goyal <[EMAIL PROTECTED]> > > > wrote: > > > > > > > Hi All, > > > > > > > > I have been wanting to do a wildcard search with * as a first letter > on > > > an > > > > index. > > > > Is there a way out except for setAllowLeadingWildcard() of > QueryParser > > to > > > > true? Because, i have heard it is an expensive operation. > > > > > > > > Thanks > > > > Aditi > > > > > > > > > >
