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From Ajinkya Kale <kaleajin...@gmail.com>
Subject Re: Question related to reranking and RankQuery
Date Fri, 18 Sep 2015 18:42:53 GMT
Is there a way I can issue a regular query with q and then apply
functionQuery only on the top n documents of the result from q ?
Applying functionQuery on all documents will be very expensive in my case.
I am not able to find a way to "rerank" only top N documents using Function
Query.

--aj

On Fri, Sep 18, 2015 at 5:04 AM Joel Bernstein <joelsolr@gmail.com> wrote:

> 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
> http://joelsolr.blogspot.com/
>
> On Thu, Sep 17, 2015 at 10:44 PM, Ajinkya Kale <kaleajinkya@gmail.com>
> wrote:
>
> > 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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