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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2426) change sort order to binary order
Date Sun, 02 May 2010 14:20:55 GMT
change sort order to binary order
---------------------------------

                 Key: LUCENE-2426
                 URL: https://issues.apache.org/jira/browse/LUCENE-2426
             Project: Lucene - Java
          Issue Type: Improvement
          Components: Index
    Affects Versions: 4.0.0
            Reporter: Robert Muir
             Fix For: 4.0.0


Since flexible indexing, terms are now represented as byte[], but for backwards compatibility
reasons, they are not sorted as byte[], but instead as if they were char[].

I think its time to look at sorting terms as byte[]... this would yield the following improvements:
* terms are more opaque by default, they are byte[] and sort as byte[]. I think this would
make lucene friendlier to customizations.
* numerics and collation are then free to use their own encoding (full byte) rather than avoiding
the use of certain bits to remain compatible with char[] sort order.
* automaton gets simpler because as in LUCENE-2265, it uses byte[] too, and has special hacks
because terms are sorted as char[]


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