CustomScoreQuery (function query) is broken (due to per-segment searching)
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Key: LUCENE-2190
URL: https://issues.apache.org/jira/browse/LUCENE-2190
Project: Lucene - Java
Issue Type: Bug
Components: Search
Affects Versions: 3.0, 2.9.1, 2.9, 3.0.1, 3.1
Reporter: Michael McCandless
Assignee: Michael McCandless
Fix For: 2.9.2, 3.0.1, 3.1
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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