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https://issues.apache.org/jira/browse/SOLR-6062?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14012659#comment-14012659
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Michael Dodsworth commented on SOLR-6062:
-----------------------------------------
Thanks for looking at this, [~ramayer],
Here's an example that shows both the grouping within a particular pf? query
(where the supplied fields have the same slop) and the splitting out/layering
of queries when different slops are used for the same field(s). Hold on to your
hats...
{"q", "aaaa bbbb cccc",
"qf", "phrase_sw phrase1_sw",
"pf", "phrase_sw~1^10 phrase_sw~2^20 phrase_sw^30",
"pf2", "phrase_sw~2^22 phrase_sw^33 phrase1_sw~2^44 phrase1_sw~4^55",
"pf3", "phrase_sw~2^222 phrase_sw^333 phrase1_sw~2^444 phrase1_sw~4^555"}
# pf -- phrase_sw with 3 different slop values results in 3 independent dismax
queries
DisjunctionMaxQuery((phrase_sw:"aaaa bbbb cccc"~1^10.0))
DisjunctionMaxQuery((phrase_sw:"aaaa bbbb cccc"~2^20.0))
DisjunctionMaxQuery((phrase_sw:"aaaa bbbb cccc"^30.0))
# pf2 -- phrase_sw and phrase1_sw were both supplied with a slop of 2, so those
queries are grouped
(
DisjunctionMaxQuery((phrase_sw:"aaaa bbbb"~2^22.0 | phrase1_sw:"aaaa
bbbb"~2^44.0))
DisjunctionMaxQuery((phrase_sw:"bbbb cccc"~2^22.0 | phrase1_sw:"bbbb
cccc"~2^44.0))
)
(
DisjunctionMaxQuery((phrase_sw:"aaaa bbbb"^33.0))
DisjunctionMaxQuery((phrase_sw:"bbbb cccc"^33.0))
)
(
DisjunctionMaxQuery((phrase1_sw:"aaaa bbbb"~4^55.0))
DisjunctionMaxQuery((phrase1_sw:"bbbb cccc"~4^55.0))
)
# pf3
DisjunctionMaxQuery((phrase_sw:"aaaa bbbb cccc"~2^222.0 | phrase1_sw:"aaaa bbbb
cccc"~2^444.0))
DisjunctionMaxQuery((phrase_sw:"aaaa bbbb cccc"^333.0))
DisjunctionMaxQuery((phrase1_sw:"aaaa bbbb cccc"~4^555.0)))
> 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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