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From "Erick Erickson (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-3747) Solr Score threshold 'reasonably', independent of results returned
Date Tue, 21 Aug 2012 15:53:38 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13438814#comment-13438814
] 

Erick Erickson commented on SOLR-3747:
--------------------------------------

Your point isn't invalid, it's just not appropriate for a JIRA, it's not likely that anyone
will make a code change to handle this as it appears to be a usage question.

It's better asked on the user's list, which I note you've already done. Please confine the
discussion to the user's list and raise a JIRA if there is a bona-fide issue with the Solr
code that would require a code change... 
                
> Solr Score threshold 'reasonably', independent of results returned
> ------------------------------------------------------------------
>
>                 Key: SOLR-3747
>                 URL: https://issues.apache.org/jira/browse/SOLR-3747
>             Project: Solr
>          Issue Type: Task
>          Components: Schema and Analysis
>            Reporter: Ramzi Alqrainy
>              Labels: documentation
>         Attachments: Screen Shot 2012-08-21 at 5.30.38 AM.png
>
>   Original Estimate: 5h
>  Remaining Estimate: 5h
>
> Usually, search results are sorted by their score (how well the document matched the
query), but it is common to need to support the sorting of supplied data too.
> Boosting affects the scores of matching documents in order to affect ranking in score-sorted
search results. Providing a boost value, whether at the document or field level, is optional.

> When the results are returned with scores, we want to be able to only "keep" results
that are above some score (i.e. results of a certain quality only). Is it possible to do this
when the returned subset could be anything?
> I ask because it seems like on some queries a score of say 0.008 is resulting in a decent
match, whereas other queries a higher score results in a poor match.
> I have written pseudo code to achieve what I said.
> Note: I have attached my code as screenshot
>       double scoreLimit = 0.75  #For example
>       searchResults = new Results[numberOfResults];
>       boolean lastScore=false;
>       solrSearchResults = Calling Solr Engine.
>       for( Result result : solrSearchResults) {
>         if (lastScore != false && result.score/lastScore<scoreLimit) break;
>         	lastScore = result.score;
>             Adding new result to searchResults array      					
>       }

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