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From "Peter Keegan (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LUCENE-1341) BoostingNearQuery class (prototype)
Date Thu, 23 Apr 2009 17:30:30 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1341?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Peter Keegan updated LUCENE-1341:
---------------------------------

    Attachment: lucene-1341-new-1.patch

As I was debugging a unit test for BoostingNearQuery, I discovered that not all the payloads
were getting read. The 'needToLoadPayload' flag on the termpos was getting reset on the last
term in the span by NearSpansOrdered. Then I noticed that the term positions aren't even needed
in BNQ because they were already collected by the Spans in 'matchPayload'. So, here is a newer,
simpler implementation of BNQ along with some unit tests.

Peter



> BoostingNearQuery class (prototype)
> -----------------------------------
>
>                 Key: LUCENE-1341
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1341
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: Query/Scoring
>    Affects Versions: 2.3.1
>            Reporter: Peter Keegan
>            Assignee: Grant Ingersoll
>            Priority: Minor
>             Fix For: 3.0
>
>         Attachments: bnq.patch, bnq.patch, BoostingNearQuery.java, BoostingNearQuery.java,
lucene-1341-new-1.patch, LUCENE-1341-new.patch, LUCENE-1341.patch
>
>
> This patch implements term boosting for SpanNearQuery. Refer to: http://www.gossamer-threads.com/lists/lucene/java-user/62779
> This patch works but probably needs more work. I don't like the use of 'instanceof',
but I didn't want to touch Spans or TermSpans. Also, the payload code is mostly a copy of
what's in BoostingTermQuery and could be common-sourced somewhere. Feel free to throw darts
at it :)

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