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From "Hoss Man (JIRA)" <>
Subject [jira] Commented: (LUCENE-446) FunctionQuery - score based on field value
Date Tue, 20 Mar 2007 00:23:32 GMT


Hoss Man commented on LUCENE-446:

I'm in favor ... i think once upon a time Yonik held off because he wasn't sure if he liked
the API, but since it's been in Apache Solr for over a year now, i think it's safe.

I don't suppose you'd be interested in opening a sister Solr issue and submitting a patch
to deprecate those instances and make them subclass the ones you'll be migrating to Lucene
would you? :)

> FunctionQuery - score based on field value
> ------------------------------------------
>                 Key: LUCENE-446
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Search
>    Affects Versions: 1.9
>            Reporter: Yonik Seeley
>         Attachments:,
> FunctionQuery can return a score based on a field's value or on it's ordinal value.
> FunctionFactory subclasses define the details of the function.  There is currently a
LinearFloatFunction (a line specified by slope and intercept).
> Field values are typically obtained from FieldValueSourceFactory.  Implementations include
FloatFieldSource, IntFieldSource, and OrdFieldSource.

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