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From Tomás Fernández Löbbe (JIRA) <j...@apache.org>
Subject [jira] [Created] (SOLR-2580) Create a new Search Component to alter queries based on business rules.
Date Wed, 08 Jun 2011 14:36:58 GMT
Create a new Search Component to alter queries based on business rules. 
------------------------------------------------------------------------

                 Key: SOLR-2580
                 URL: https://issues.apache.org/jira/browse/SOLR-2580
             Project: Solr
          Issue Type: New Feature
            Reporter: Tomás Fernández Löbbe


The goal is to be able to adjust the relevance of documents based on user defined business
rules.

For example, in a e-commerce site, when the user chooses the "shoes" category, we may be interested
in boosting products from a certain brand. This can be expressed as a rule in the following
way:

rule "Boost Adidas products when searching shoes"
    when
        $qt : QueryTool()
        TermQuery(term.field=="category", term.text=="shoes")
    then
        $qt.boost("{!lucene}brand:adidas");
end

The QueryTool object should be used to alter the main query in a easy way. Even more human-like
rules can be written:

rule "Boost Adidas products when searching shoes"
 when
    Query has term "shoes" in field "product"
 then
    Add boost query "{!lucene}brand:adidas"
end

These rules are written in a text file in the config directory and can be modified at runtime.
Rules will be managed using JBoss Drools: http://www.jboss.org/drools/drools-expert.html

On a first stage, it will allow to add boost queries or change sorting fields based on the
user query, but it could be extended to allow more options.

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