The eDisMax query parser

Let us understand the working of the eDisMax query parser. We will also look at the minimum should match parameter and filters in this section.

Working of the eDisMax query parser

Let us first refresh our memory about the different query modes in Solr. Query modes are ways to call different query parsers to process a query. Solr has different query modes that are specified by the defType parameter in the Solr URL. The defType parameter can also be changed by specifying a different defType parameter for the requestHandler property in the solrconfig.xml file. The popularly used query modes available in Solr are DisMax (disjunction Max) and eDisMax (extended disjunction max) in addition to the default (no defType) query mode. There are many other queryModes available, such as lucene, maxscore, and surround, but these are less used.

The query parser used by DisMax can process simple phrases entered by the user and search for individual terms across different fields using...