Wildcard Query

[Pace Davis]

I have been using Lucene for about a month now and trying to port the same
functionality to Solr.  How do I do a wildcard query with a leading "*"
 ...This is possible with Lucene if you do not use the standard query
parser.  How do you do this with Solr  This is probably very easy but I
can not find any information in docs or mailing list.

Please help

Thanks

Re: Wildcard Query

[Pace Davis]

Ok, before I go start writing a new request handlerlet me ask a dumb
question and see if I am approaching this wrong in Solr. If I am trying to
search a field where I have one doc with a field that has a value of "Hello
World"...if the search query is "ello"  ...currently is there a way to make
this query match this field?


> From: Chris Hostetter <[EMAIL PROTECTED]>
> Reply-To: solr-user@lucene.apache.org
> Date: Tue, 20 Jun 2006 01:09:52 -0700 (PDT)
> To: solr-user@lucene.apache.org
> Subject: Re: Wildcard Query
> 
> 
> : I have been using Lucene for about a month now and trying to port the same
> : functionality to Solr.  How do I do a wildcard query with a leading "*"
> :  ...This is possible with Lucene if you do not use the standard query
> : parser.  How do you do this with Solr  This is probably very easy but I
> : can not find any information in docs or mailing list.
> 
> There is no easy way to change this just by modifying configuration --
> you'll need to write your own request handler which uses the QueryParser
> of your choice.
> 
> 
> -Hoss
> 
> 

Re: Wildcard Query

[Pace Davis]

Thanks for all the help.  The only field where I need this is to search sku
fields...example being "19-JN910"  The search needs to be able to pull a
match if the query were "JN" ...Erik's solution is the way to go and simple
to implement.  



> From: "Yonik Seeley" <[EMAIL PROTECTED]>
> Reply-To: solr-user@lucene.apache.org
> Date: Tue, 20 Jun 2006 09:53:53 -0400
> To: solr-user@lucene.apache.org
> Subject: Re: Wildcard Query
> 
> On 6/20/06, Pace Davis <[EMAIL PROTECTED]> wrote:
>> I have been using Lucene for about a month now and trying to port the same
>> functionality to Solr.  How do I do a wildcard query with a leading "*"
>>  ...This is possible with Lucene if you do not use the standard query
>> parser.
> 
> It's not really possible to do efficiently with Lucene out-of-the-box either.
> Terms are sorted, so foo* is a relatively quick query, but *foo is
> horribly slow since all terms must be scanned.
> 
> You can do things like what Erik suggests... index all the variants:
> "Hello" "ello" "llo", etc
> Another more limited form that would take up less index space would be
> to index the reverse of the token as well:
> Index="olleH",  query="olle*"
> 
> We don't yet have an analyzer to do this (and neither does Lucene AFAIK).
> As Chris points out, in addition to analysis components, the
> QueryParse would need to be changed as well.
> 
> I've thought about hooking in the QueryParser to the FieldTypes more before...
> One reason is to know if something like a prefix query should be
> lowercased or not.
> Another reason could be to handle special construction of wildcard
> queries when there is support for "*foo".
> 
> 
> -Yonik
>