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From "Erik Hatcher (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-446) FunctionQuery - score based on field value
Date Sun, 18 Mar 2007 14:39:09 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-446?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12481944
] 

Erik Hatcher commented on LUCENE-446:
-------------------------------------

+1 to FunctionQuery being brought into Lucene proper.

> FunctionQuery - score based on field value
> ------------------------------------------
>
>                 Key: LUCENE-446
>                 URL: https://issues.apache.org/jira/browse/LUCENE-446
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Search
>    Affects Versions: 1.9
>            Reporter: Yonik Seeley
>         Attachments: function.zip, function.zip
>
>
> 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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