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From "James Dyer (JIRA)" <>
Subject [jira] [Updated] (SOLR-2058) Adds optional "phrase slop" to edismax "pf2", "pf3" and "pf" parameters with field~slop^boost syntax
Date Thu, 17 May 2012 20:00:08 GMT


James Dyer updated SOLR-2058:

    Attachment: SOLR-2058.patch

Here is an updated patch based on Ron's August 31, 2010 version.  I've cleaned up the code
a little and added a unit test scenario.  To recap what this does:

- Fully backwards compatible with the existing pf/pf2/pf3/ps syntax.
- Allows an optional slop parameter in the syntax "FieldName~slop^boost"
- "ps" value is the default if the slop is not specified per-field

This will give users the flexibility to say something like "if the words are kinda near each
other, boost a little but if they are really near each other, boost a lot, etc"

Unless someone objects, I will re-assign this issue to myself and commit early next week.
> Adds optional "phrase slop" to edismax "pf2", "pf3" and "pf" parameters with field~slop^boost
> ----------------------------------------------------------------------------------------------------
>                 Key: SOLR-2058
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: query parsers
>         Environment: n/a
>            Reporter: Ron Mayer
>            Assignee: Jan Høydahl
>            Priority: Minor
>             Fix For: 4.0
>         Attachments: SOLR-2058.patch, edismax_pf_with_slop_v2.1.patch, edismax_pf_with_slop_v2.patch,
> {quote}
> From	Ron Mayer <>
> ... my results might  be even better if I had a couple different "pf2"s with different
"ps"'s  at the same time.   In particular.   One with ps=0 to put a high boost on ones the
have  the right ordering of words.  For example insuring that [the query]:
>   "red hat black jacket"
>  boosts only documents with "red hats" and not "black hats".   And another pf2 with a
more modest boost with ps=5 or so to handle the query above also boosting docs with 
>   "red baseball hat".
> {quote}
> []
> {quote}
> From	Yonik Seeley <>
> Perhaps fold it into the pf/pf2 syntax?
> pf=text^2    // current syntax... makes phrases with a boost of 2
> pf=text~1^2  // proposed syntax... makes phrases with a slop of 1 and
> a boost of 2
> That actually seems pretty natural given the lucene query syntax - an
> actual boosted sloppy phrase query already looks like
> {{text:"foo bar"~1^2}}
> -Yonik
> {quote}
> []
> {quote}
> From	Chris Hostetter <>
> Big +1 to this idea ... the existing "ps" param can stick arround as the 
> default for any field that doesn't specify it's own slop in the pf/pf2/pf3 
> fields using the "~" syntax.
> -Hoss
> {quote}

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