Solr has had full featured Field Collapsing and Grouping since 2010. The CollapsingQParserPlugin, which was recently committed, provides an alternative approach with more specific design goals. Design Goals The initial CollapsingQParserPlugin requirements were driven by a Solr ECommerce user. The … Continued
I previously introduced Solr’s Result Grouping, also called Field Collapsing, that limits the number of documents shown for each “group”, normally defined as the unique values in a field or function query. Since then, there have been a number of … Continued
Result Grouping, also called Field Collapsing, has been committed to Solr! This functionality limits the number of documents for each “group”, usually defined by the unique values in a field (just like field faceting). You can think of it like … Continued
