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From "Simon Willnauer (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-5489) Add query rescoring API
Date Tue, 18 Mar 2014 11:22:48 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-5489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13939079#comment-13939079
] 

Simon Willnauer commented on LUCENE-5489:
-----------------------------------------

I'd be totally ok with skipping the Explain that can be fixed later or in user code. I think
as long as I can override the combine it's actually helpful. I think for users the static
simple method should remain but I don't think the (non-static) rescore method should be polluted
with a Query since that is impl. specifc and can be passed via Ctor args or so but still be
hidden if the user uses the simple static API.

> Add query rescoring API
> -----------------------
>
>                 Key: LUCENE-5489
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5489
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>             Fix For: 4.8, 5.0
>
>         Attachments: LUCENE-5489.patch, LUCENE-5489.patch
>
>
> When costly scoring factors are used during searching, a common
> approach is to do a cheaper / basic query first, collect the top few
> hundred hits, and then rescore those hits using the more costly
> query.
> It's not clear/simple to do this with Lucene today; I think we should
> make it easier.



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