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From "Mark Harwood (JIRA)" <>
Subject [jira] Updated: (LUCENE-1999) Match spotter for all query types
Date Tue, 20 Oct 2009 23:10:01 GMT


Mark Harwood updated LUCENE-1999:

    Attachment: matchflagger.patch

> Match spotter for all query types
> ---------------------------------
>                 Key: LUCENE-1999
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>    Affects Versions: 2.9
>            Reporter: Mark Harwood
>         Attachments: matchflagger.patch
> Related to LUCENE-1929 and the current inability to highlight NumericRangeQuery, spatial,
cached term filters and other exotica.
> This patch provides the ability to wrap *any* Query objects and record match info as
flags encoded in the overall document score.
> Using this approach it would be possible to understand (and therefore highlight) which
fields matched clauses in a query.
> The match encoding approach loses some precision in scores as noted here:
> Avoiding these precision issues would require a change to Lucene core to record docId,
score AND a matchFlag byte in ScoreDoc objects and collector APIs.
> This may be something we should consider.

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