lucene-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Hoss Man (JIRA)" <>
Subject [jira] [Commented] (LUCENE-3395) FreqFilteringScorerWrapper and min/max freq options on TermQuery
Date Mon, 22 Aug 2011 19:06:29 GMT


Hoss Man commented on LUCENE-3395:

bq. Because if we hook it straight into this query, then someone will want it in SpanTermQuery,
and PayloadTermQuery, and PhraseQuery, and their own queries???...

They might -- but like i said, i was focused on what seemed like the common/simple case. "make
the common case easy, and the uncommon case 'possible'"

bq. Yes! I think we should make a query that wraps another query to do this? Similar to ConstantScoreQuery?

I'm totally on board with the idea, i just don't really understand what the implementation
should look like -- not because i don't think it's possible, i just don't personally understand
how to write it.  Would the weight of the wrapper query just proxy directly to the inner query
for all of the methods except scorer(..) ?

> 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.

This message is automatically generated by JIRA.
For more information on JIRA, see:


To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message