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add a runtime changes entry for 1483 

git-svn-id: https://svn.apache.org/repos/asf/lucene/java/trunk@805815 13f79535-47bb-0310-9956-ffa450edef68
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Mark Robert Miller 2009-08-19 14:22:03 +00:00
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@ -187,6 +187,15 @@ Changes in runtime behavior
AttributeSource.clearAttributes() to work identical for Token as one for all
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)
API Changes
1. LUCENE-1419: Add expert API to set custom indexing chain. This API is