[jira] [Assigned] (SOLR-16857) Efficiently rerank collapsed queries with vector queries

["Joel Bernstein (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SOLR-16857?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joel Bernstein reassigned SOLR-16857:
-------------------------------------

    Assignee: Joel Bernstein

> Efficiently rerank collapsed queries with vector queries
> --------------------------------------------------------
>
>                 Key: SOLR-16857
>                 URL: https://issues.apache.org/jira/browse/SOLR-16857
>             Project: Solr
>          Issue Type: New Feature
>      Security Level: Public(Default Security Level. Issues are Public) 
>            Reporter: Joel Bernstein
>            Assignee: Joel Bernstein
>            Priority: Major
>
> E-commerce catalogs often use collapse to collapse product records within a group. For example a particular couch might come in different colors or fabrics. So a single couch might have a large number of slightly different records within the group.
> When reranking a collapsed query with a vector query the vector query will select the top K matches based on the vector. The top K could include multiple records from within the same product group although only one group head was selected from the group. This will pollute the top K results with lots of duplicate records of no value.
> The solution is to devise a filter that limits the vector query to searching only the selected group heads from the collapse.



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