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From Joel Bernstein <>
Subject Re: Question related to reranking and RankQuery
Date Fri, 18 Sep 2015 12:04:33 GMT
The ReRankQuery re-ranks the Top N documents of the main query based on a
query. Rather then the CustomScoreQuery you may want to look at ReRanking
by a Function Query using the FunctionQParserPlugin. This would allow you
to directly control the ReRankScore for the top N documents.

Writing your own RankQuery should be the last resort if you can't make a
Function Query do what you need to do.

Joel Bernstein

On Thu, Sep 17, 2015 at 10:44 PM, Ajinkya Kale <>

> Hi all,
> I am new to Solr. I have a QParser plugin which uses an implementation
> of CustomScoreQuery to provide custom score for each document.
> Is there a way I can use the same plugin to provide score for top N
> documents after an initial query/sort ?
> I looked at the ReRankQParserPlugin but it looks lot more involved to write
> a custom RankQuery implementation. So I was thinking if I can reuse my
> existing CustomScoreQuery implementation to provide score for top N
> documents to rerank.
> On a side note, is there a place where the ReRankQParserPlugin is explained
> in detail ?
> --aj

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