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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] Commented: (LUCENE-2261) configurable MultiTermQuery TopTermsScoringBooleanRewrite pq size
Date Thu, 11 Feb 2010 18:10:57 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-2261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12832607#action_12832607
] 

Uwe Schindler commented on LUCENE-2261:
---------------------------------------

Patch looks good, some things because of serializable:
- The readResove method must go to the singleton constant, which should also throw UOE when
modified
- euquals / hashcode is neaded for the rewritemode, else FuzzyQuery & Co would no longer
compare

It could be solved by doing like for AutoRewrite and its unmodifiable constant. I know: Queries
are a pain because of Serializable.

+1 on adding a param to FuzzyQuery ctor

> configurable MultiTermQuery TopTermsScoringBooleanRewrite pq size
> -----------------------------------------------------------------
>
>                 Key: LUCENE-2261
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2261
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Search
>            Reporter: Robert Muir
>            Priority: Minor
>             Fix For: Flex Branch, 3.1
>
>         Attachments: LUCENE-2261.patch
>
>
> MultiTermQuery has a TopTermsScoringBooleanRewrite, that uses a priority queue to expand
the query to the top-N terms.
> currently N is hardcoded at BooleanQuery.getMaxClauseCount(), but it would be nice to
be able to set this for top-N MultiTermQueries: e.g. expand a fuzzy query to at most only
the 50 closest terms.
> at a glance it seems one way would be to expose TopTermsScoringBooleanRewrite (it is
private right now) and add a ctor to it, so a MultiTermQuery can instantiate one with its
own limit.

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