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From "Robert Muir (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3395) FreqFilteringScorerWrapper and min/max freq options on TermQuery
Date Mon, 22 Aug 2011 18:09:29 GMT


Robert Muir commented on LUCENE-3395:

should we add a doNext() used by both nextDoc() and advance()

> FreqFilteringScorerWrapper and min/max freq options on TermQuery
> ----------------------------------------------------------------
>                 Key: LUCENE-3395
>                 URL:
>             Project: Lucene - Java
>          Issue Type: New Feature
>            Reporter: Hoss Man
>         Attachments: LUCENE-3395.patch
> A Solr User was asking about how specify a minimum tf when searching for a term (ie:
documents matching "dog" at least 3 times).
> Based on a conversation with rmuir on IRC, that led me to realize that we now explicitly
expose a general "freq()" method on Scorer, and that min/max freq constraints could be implemented
as a general Scorer Wrapper.
> I propose that we add such a wrapper, and add setMinFreq(float)/setMaxFreq(float) methods
to TermQuery (similar to the minNumShouldMatches and disableCoord type setters in BooleanQuery)
that cause it to be used automatically.

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