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improve/correct runtime entry for LUCENE-1483 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@807767 13f79535-47bb-0310-9956-ffa450edef68
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Mark Robert Miller 2009-08-25 19:13:38 +00:00
parent ebbae9eb92
commit e0b5100b80
1 changed files with 11 additions and 7 deletions
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@ -187,13 +187,17 @@ Changes in runtime behavior
AttributeImpl and the 6 separate AttributeImpls. (Uwe Schindler, Michael Busch)
13. LUCENE-1483: When searching over multiple segments, a new Scorer is now created
for each segment. The Weight is created only once for the top level Searcher.
Each Scorer is passed the per-segment IndexReader. This will result in docids
in the Scorer being internal to the per-segment IndexReader. If a custom Scorer
implementation uses any caches/filters that rely on being based on the top level
IndexReader, it will need to be updated to use caches/filters on a per segment
basis. There is currently no way provided to rebase the docids in the Scorer to
the top level IndexReader. (Mark Miller, Mike McCandless)
for each segment. Searching has been telescoped out a level and IndexSearcher now
operates much like MultiSearcher does. The Weight is created only once for the top
level Searcher, but each Scorer is passed a per-segment IndexReader. This will
result in doc ids in the Scorer being internal to the per-segment IndexReader. It
has always been outside of the API to count on a given IndexReader to contain every
doc id in the index - and if you have been ignoring MultiSearcher in your custom code
and counting on this fact, you will find your code no longer works correctly. If a
custom Scorer implementation uses any caches/filters that rely on being based on the
top level IndexReader, it will need to be updated to correctly use contextless
caches/filters eg you can't count on the IndexReader to contain any given doc id or
all of the doc ids. (Mark Miller, Mike McCandless)
14. LUCENE-1846: DateTools now uses the US locale to format the numbers in its
date/time strings instead of the default locale. For most locales there will