[jira] [Created] (SOLR-9403) Add classify() function query for use with re-ranking

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

Joel Bernstein created SOLR-9403:
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             Summary: Add classify() function query for use with re-ranking
                 Key: SOLR-9403
                 URL: https://issues.apache.org/jira/browse/SOLR-9403
             Project: Solr
          Issue Type: New Feature
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Joel Bernstein


Now that SOLR-9252 is committed it would be useful to deploy a classifier during re-ranking. 

The classify function query will retrieve a model from a SolrCloud collection and run the model on documents. The function will return the score from the model. When used with the re-ranker this will re-rank the top N documents by the score from the model.

The classify function can be used with the re-ranker using the function qparser plugin.

The suggested syntax:

rq={!rerank reRankQuery=$rqq reRankDocs=20}&rqq={!func}classify(collection, modelID, textField)






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