Create a new Search Component to alter queries based on business rules.
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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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