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From "Ron Mayer (JIRA)" <>
Subject [jira] Updated: (SOLR-2058) Adds optional "slop" to "pf2", "pf3" and "pf" parameters
Date Thu, 19 Aug 2010 12:01:18 GMT


Ron Mayer updated SOLR-2058:

    Attachment: pf2_with_slop.patch

This patch is my first draft at implementing this feature.

Any feedback would be appreciated.

It seems to happily turn a query like

into what I believe is the desired parsed query:

+((text:enterpris) (text:search) (text:foobar)) ((name:"enterprise search"~5^12.0) (name:"search
foobar"~5^12.0)) ((name:"enterprise search"^5555.0) (name:"search foobar"^5555.0)) ((name:"enterprise
search"~10) (name:"search foobar"~10))

which looks like it should give a high boost to docs where both words appear right next to
each other, but still substantial boosts to docs where the pairs of words are a few words

> Adds optional "slop" to "pf2", "pf3" and "pf" parameters 
> ---------------------------------------------------------
>                 Key: SOLR-2058
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: SearchComponents - other
>    Affects Versions: 3.1, 4.0
>         Environment: n/a
>            Reporter: Ron Mayer
>            Priority: Minor
>         Attachments: pf2_with_slop.patch
>   Original Estimate: 168h
>  Remaining Estimate: 168h
> {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:
>   "red hat black jacket"
>  boosts only 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
> http
> {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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