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https://issues.apache.org/jira/browse/LUCENE-850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12509993
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Tim Sturge commented on LUCENE-850:
-----------------------------------

I just asked for a product scored BooleanQuery on java-users and Mike pointed 
me in the direction of this bug. My use case is to get the non-phrase query 
"John Bush" to rank "John Bush" higher than "George Bush" or "John Kerry". I 
believe this is a common use case (I have 3 or 4 bugs filed against search 
quality internally that boil down to this issue.)



> Easily create queries that transform subquery scores arbitrarily
> ----------------------------------------------------------------
>
>                 Key: LUCENE-850
>                 URL: https://issues.apache.org/jira/browse/LUCENE-850
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: Search
>            Reporter: Mike Klaas
>         Attachments: prodscorer.patch.diff
>
>
> Refactor DisMaxQuery into SubQuery(Query|Scorer) that admits easy 
> subclassing.  An example is given for multiplicatively combining scores.
> Note: patch is not clean; for demonstration purposes only.

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