Solr edismax boost query

Before starting keep in mind that SolrDisMaxQuery class was not part of the 2.0.0 release.

But still you can download the current master branch from following link:-

http://git.php.net/?p=pecl/search_engine/solr.git;a=shortlog;h=refs/heads/master

With eDismax you can filter you result with more accuracy and boost your query with extra params

Like if you want to search doctor on basis of First Name, Middle Name and Last Name. Normal query will search your string in all these filed like

You typed Rajeev Kumar then normal query will search like

First Name = Rajeev

Middle Name = Rajeev

Last Name = Rajeev

First Name = Kumar

Middle Name = Kumar

Lat Name = Kumar

But you want to check exact combination in order first-middle-last Name then eDismax query is super power for you.

I am explaining with code example

1. Creating connection parameter for Solr server

   $optionsEdimax = array
                   (
   
                    'hostname' => "localhost",
   
                   'login'    => "admin",
   
                    'password' => "",
   
                   'port'     => "8399",
   
                   'path'     => '/solr/doctor_list,
   
                   'wt'            => "json",
   
                    'indent'  => 1,
   
                   );

2. Initialize object

   $client = new SolrClient($optionsEdimax);

3. initialize Dismax object

   $dismaxQuery = new SolrDisMaxQuery();

4. Allow to use eDismax Query Parser

   $dismaxQuery->useEDisMaxQueryParser();

5. Add query string

   $queryStr = "first_name=Rajeev Kumar* middle_name= Rajeev Kumar*   last_name= Rajeev Kumar*"

6. Pass query string in eDismax Query

   $dismaxQuery->setQuery($queryStr);

7. Add extra prams like no of fetch records

   $dismaxQuery->setRows(10);

8. Now main part of eDismax Query like how much probability you want in terms

   $dismaxQuery->addQueryField("first_name", 1.5);
   $dismaxQuery->addQueryField("middle_name", 1.5);
   $dismaxQuery->addQueryField("last_name", 1.5);

   Means equal search in all three field for all keywords.

9. And what is the calculation of minimum match

   $dismaxQuery->setMinimumMatch("1<-75% 2<-2");

   means if only single word then match 25% and if more than one word then will match 75%
   http://lucene.apache.org/solr/5_0_0/solr-core/org/apache/solr/util/doc-files/min-should-match.html

10. Now time to run your query for response

    $query_response = $client->query($dismaxQuery);

11. Get response

    $response = $query_response->getResponse();

That’s it with above simple step you can Boost your search results with normal search.

For more parameter passing you can check below link

https://wiki.apache.org/solr/ExtendedDisMax

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Rajeev Achra

I am a software engineer who specializes in Internet applications. I have worked with a wide variety of technologies and programming languages to open source LAMP environments. I have more than 6 years of object-oriented programming experience and am highly proficient in ActionScript, PHP, MYSQL, JavaScript, Jquery and a multitude of other technologies used in modern web applications.

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