norm compression breaks ranking for small fields
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Key: LUCENE-517
URL: http://issues.apache.org/jira/browse/LUCENE-517
Project: Lucene - Java
Type: Bug
Components: Index, Search
Versions: 1.9
Environment: N/A
Reporter: Randy Puttick
The scheme of compressing document norms to one byte loses a lot of
information. This completely breaks search ranking on small fields because
there is no way to see the difference between documents with shorter and longer
fields that contain the same number of matching query terms. Unfortunately the
export of norms as a byte array seems to be pretty well embedded in the code
base so a fix would seem to require a major rev.
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