[jira] [Created] (SOLR-5160) MoreLikeThis (MLT) - New Optional Params - mlt.operator & mlt.sort

["Kranti Parisa (JIRA)" <ji...@apache.org>]

Kranti Parisa created SOLR-5160:
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             Summary: MoreLikeThis (MLT) - New Optional Params -  mlt.operator & mlt.sort
                 Key: SOLR-5160
                 URL: https://issues.apache.org/jira/browse/SOLR-5160
             Project: Solr
          Issue Type: Improvement
          Components: MoreLikeThis
            Reporter: Kranti Parisa
            Priority: Minor


It seems that when we pass multiple field names with mlt.fl parameter, it is ORing them to find the MLT documents.

Is there a way to specify AND operator? Means if mlt.fl=language,year, then we should return back the MLT documents which has language AND year field values as same as the main query result document.

http://localhost:8180/solr/mltCore/mlt?q=id:111111111&wt=json&mlt=true&mlt.fl=language,year&fl=*,score&mlt.mindf=0&mlt.mintf=0&mlt.match.include=false

The above query should return those documents whose field values (language, year) are exactly matching with the document id:111111111.

Is this possible thru any config or param? If not, I think it's worth having as a feature because we don't know the values of those fields to apply as FQ. 


 was looking at the code and found that it is hard coded to Occur.SHOULD in MoreLikeThisQuery.

I customized the code to pass a new parameter mlt.operator=AND/OR  based on that it computes the MLT documents. Default operator is set to OR.
And I also want to have mlt.sort option, So I will be trying for that as well.

Do you guys think, we should make this part of the MLT feature? 
Please share your ideas. I can submit this change.



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