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From Joel Bernstein <joels...@gmail.com>
Subject Re: Question related to reranking and RankQuery
Date Fri, 18 Sep 2015 19:00:17 GMT
The syntax would be something like this:

q=hello+world&rq={!rerank reRankQuery=$rqq
reRankDocs=100}&rqq={!func}myFunc()

I'm not sure if there is a test case demonstrating this but it should work.

Joel Bernstein
http://joelsolr.blogspot.com/

On Fri, Sep 18, 2015 at 2:42 PM, Ajinkya Kale <kaleajinkya@gmail.com> wrote:

> 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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