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https://issues.apache.org/jira/browse/SOLR-6062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13999275#comment-13999275
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Michael Dodsworth commented on SOLR-6062:
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all comments and feedback welcome.
> Phrase queries are created for each field supplied through edismax's pf, pf2
> and pf3 parameters (rather them being combined in a single dismax query)
> -----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: SOLR-6062
> URL: https://issues.apache.org/jira/browse/SOLR-6062
> Project: Solr
> Issue Type: Bug
> Components: query parsers
> Affects Versions: 4.0
> Reporter: Michael Dodsworth
> Priority: Minor
> Attachments: combined-phrased-dismax.patch
>
>
> https://issues.apache.org/jira/browse/SOLR-2058 subtly changed how phrase
> queries, created through the pf, pf2 and pf3 parameters, are merged into the
> main user query.
> For the query: 'term1 term2' with pf2:[field1, field2, field3] we now get
> (omitting the non phrase query section for clarity):
> {code:java}
> <main query>
> DisjunctionMaxQuery((field1:"term1 term2"^1.0)~0.1)
> DisjunctionMaxQuery((field2:"term1 term2"^1.0)~0.1)
> DisjunctionMaxQuery((field3:"term1 term2"^1.0)~0.1)
> {code}
> Prior to this change, we had:
> {code:java}
> <main query>
> DisjunctionMaxQuery((field1:"term1 term2"^1.0 | field2:"term1 term2"^1.0 |
> field3:"term1 term2"^1.0)~0.1)
> {code}
> The upshot being that if the phrase query "term1 term2" appears in multiple
> fields, it will get a significant boost over the previous implementation.
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