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https://issues.apache.org/jira/browse/LUCENE-2190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-2190:
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Attachment: LUCENE-2190-2.patch
Updated patch (forgot to add an IOException to getCustomScoreProvider and fixed
test).
Will backport after committing to 3.0 and 2.9 (argh).
> CustomScoreQuery (function query) is broken (due to per-segment searching)
> --------------------------------------------------------------------------
>
> Key: LUCENE-2190
> URL: https://issues.apache.org/jira/browse/LUCENE-2190
> Project: Lucene - Java
> Issue Type: Bug
> Components: Search
> Affects Versions: 2.9, 2.9.1, 3.0, 3.0.1, 3.1
> Reporter: Michael McCandless
> Assignee: Michael McCandless
> Fix For: 2.9.2, 3.0.1, 3.1
>
> Attachments: LUCENE-2190-2.patch, LUCENE-2190-2.patch,
> LUCENE-2190.patch
>
>
> Spinoff from here:
> http://lucene.markmail.org/message/psw2m3adzibaixbq
> With the cutover to per-segment searching, CustomScoreQuery is not really
> usable anymore, because the per-doc custom scoring method (customScore)
> receives a per-segment docID, yet there is no way to figure out which segment
> you are currently searching.
> I think to fix this we must also notify the subclass whenever a new segment
> is switched to. I think if we copy Collector.setNextReader, that would be
> sufficient. It would by default do nothing in CustomScoreQuery, but a
> subclass could override.
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