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From "Michael McCandless (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-2590) Enable access to the freq information in a Query's sub-scorers
Date Sat, 14 Aug 2010 14:08:15 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-2590?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael McCandless updated LUCENE-2590:
---------------------------------------

    Attachment: LUCENE-2590.patch

Another iter of this patch; I think it's ready to commit.  I commented out BooleanScorer's
handling of required=true since we never use it (but left TODOs in there to re-enable this
code if/when we go back to sending required clauses to BooleanScorer).  I also added CHANGES
entry.

> Enable access to the freq information in a Query's sub-scorers
> --------------------------------------------------------------
>
>                 Key: LUCENE-2590
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2590
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Michael McCandless
>            Assignee: Michael McCandless
>         Attachments: 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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