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https://issues.apache.org/jira/browse/LUCENE-7721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Adrien Grand resolved LUCENE-7721.
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    Resolution: Implemented

I missed FunctionScoreQuery which already does this!

> Make it easier to combine scores with index-time factors
> --------------------------------------------------------
>
>                 Key: LUCENE-7721
>                 URL: https://issues.apache.org/jira/browse/LUCENE-7721
>             Project: Lucene - Core
>          Issue Type: Task
>            Reporter: Adrien Grand
>            Priority: Minor
>
> With the removal of index-time boosts, we should make it easy to combine the 
> score with index-time factors stored in a doc-values field. We already have 
> BoostedQuery that does it but it uses the old values source API and 
> forcefully multiplies the value of the function with the score.
> I think we should move it to core, improve it and make it work with the new 
> values source API, hopefully in a way that makes integrating expressions easy?



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