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From "Simon Willnauer (JIRA)" <>
Subject [jira] Commented: (LUCENE-2590) Enable access to the freq information in a Query's sub-scorers
Date Mon, 30 Aug 2010 20:14:53 GMT


Simon Willnauer commented on LUCENE-2590:

bq. Though, can't BS and BS2 just call super.visitSubScorers first, and then visit their subs?
(Ie right now they dup super's code right?).
Nah, good point mike :) I missed that, nice code reuse though! - will fix that soon.

> Enable access to the freq information in a Query's sub-scorers
> --------------------------------------------------------------
>                 Key: LUCENE-2590
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Michael McCandless
>            Assignee: Simon Willnauer
>         Attachments: LUCENE-2590.patch, LUCENE-2590.patch, LUCENE-2590.patch, LUCENE-2590.patch,
> The ability to gather more details than just the score, of how a given
> doc matches the current query, has come up a number of times on the
> user's lists.  (most recently in the thread "Query Match Count" by
> Ryan McV on java-user).
> EG if you have a simple TermQuery "foo", on each hit you'd like to
> know how many times "foo" occurred in that doc; or a BooleanQuery +foo
> +bar, being able to separately see the freq of foo and bar for the
> current hit.
> Lucene doesn't make this possible today, which is a shame because
> Lucene in fact does compute exactly this information; it's just not
> accessible from the Collector.

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