This issue adds the SpanFirstQuery to edismax.
https://issues.apache.org/jira/browse/SOLR-3925

It unfortuntately cannot produce progressively higher boosts if the term is 
closer to the beginning.

 
 
-----Original message-----
> From:Jack Krupansky <j...@basetechnology.com>
> Sent: Fri 30-Nov-2012 18:54
> To: solr-user@lucene.apache.org
> Subject: Re: Best way to increase boost to results that 'starts with' search 
> keyword
> 
> Two choices:
> 
> 1. You need the Lucene SpanFirstQuery, but the normal Solr query parsers 
> don't support it, so you need to roll your own.
> 2. Do a custom update processor that at index time inserts a special start 
> marker like "aaafirstaaa" at the beginning of each field that needs this 
> feature. Then, you can query for "aaafirstaaa accounting" to find documents 
> wih accounting as the first term.
> 
> If you are ambitious, you could modify/extend the Solr query parser (or 
> edismax) to add a custom boost that uses SpanFirstQuery and each term or 
> phrase. Call it "boostInitial" or something like that.
> 
> The latter would be a great feature request for Solr. (And a nice start for 
> an enterprising developer seeking to progress along on the path to becoming 
> a committer!)
> 
> -- Jack Krupansky
> 
> -----Original Message----- 
> From: bbarani
> Sent: Friday, November 30, 2012 12:16 PM
> To: solr-user@lucene.apache.org
> Subject: Best way to increase boost to results that 'starts with' search 
> keyword
> 
> Hi,
> 
> I need to boost the document containing the search keyword in the first
> position of the indexed data, ex:
> 
> If I have 3 data indexed as below,
> 
> Account number
> Data account and account number
> Information number account data account
> Account indicator
> 
> when users searches for keyword account, I want solr to first bring in the
> documents that starts with the search keyword followed by other documents.
> 
> so the result should be
> 
> Account Number
> Account indicator
> Data account and account number
> Information number account data account
> 
> Is it possible to do this?
> 
> Thanks,
> BB
> 
> 
> 
> --
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> 
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