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From "James Dyer (JIRA)" <>
Subject [jira] [Commented] (SOLR-2058) Adds optional "phrase slop" to edismax "pf2", "pf3" and "pf" parameters with field~slop^boost syntax
Date Mon, 21 May 2012 14:32:41 GMT


James Dyer commented on SOLR-2058:

Jan,  I'm curious:  is the patch you're working on more of a "clean-up" of Jack's patch, or
does it do something Jack's patch didn't do?  I've been testing this and so far while it issues
the dismax queries I'd expect, it doesn't help do relevance like I though it would.  so I'm
a little less confident about it.  I also was wondering if it should be generalized to allow
"ps[\d]" so users can have ps4, ps5 etc if they wanted.  This extra functionality wouldn't
be hard to add but would it make sense?

In any case, I would like to have something to commit here this week if possible.  Your insight
is very much appreciated.
> 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
>            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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