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From "Ramzi Alqrainy (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SOLR-3747) Solr Score threshold 'reasonably', independent of results returned
Date Tue, 21 Aug 2012 02:38:38 GMT

     [ https://issues.apache.org/jira/browse/SOLR-3747?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ramzi Alqrainy updated SOLR-3747:
---------------------------------

    Summary: Solr Score threshold 'reasonably', independent of results returned  (was: Solr
Score threshold 'reasonably', independent of results returned? )
    
> 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
>   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 accomplish what I said
>       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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