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https://issues.apache.org/jira/browse/LUCENE-8099?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16313443#comment-16313443
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David Smiley commented on LUCENE-8099:
--------------------------------------

With the addition of the nice new static utility methods on FunctionScoreQuery, 
I think you can replace the change you did to Solr's BoostQParserPlugin to 
simply be: {{return FunctionScoreQuery.boostByValue(input, 
vs.asDoubleValuesSource());}}  Maybe then inline it; I would but it's up to 
you.  Also the MIGRATE.txt notes should mention that these are replacements to 
some of the classes deleted here.

> Deprecate CustomScoreQuery, BoostedQuery and BoostingQuery
> ----------------------------------------------------------
>
>                 Key: LUCENE-8099
>                 URL: https://issues.apache.org/jira/browse/LUCENE-8099
>             Project: Lucene - Core
>          Issue Type: Improvement
>            Reporter: Alan Woodward
>            Assignee: Alan Woodward
>            Priority: Minor
>             Fix For: 7.3
>
>         Attachments: LUCENE-8099-2.patch, LUCENE-8099.patch, LUCENE-8099.patch
>
>
> After LUCENE-7998, these three queries can all be replaced by a 
> FunctionScoreQuery.  Using lucene-expressions makes them much easier to use 
> as well.



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