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From "Robert Muir (JIRA)" <j...@apache.org>
Subject [jira] Created: (SOLR-2396) deprecated char[] based collation factories / replace with byte[]-based
Date Mon, 28 Feb 2011 15:58:37 GMT
deprecated char[] based collation factories / replace with byte[]-based
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                 Key: SOLR-2396
                 URL: https://issues.apache.org/jira/browse/SOLR-2396
             Project: Solr
          Issue Type: Improvement
            Reporter: Robert Muir
             Fix For: 4.0
         Attachments: SOLR-2396.patch

In LUCENE-2551 collation support was changed to use byte[] keys.

Previously it encoded sort keys with IndexableBinaryString into char[],
but this is wasteful with regards to RAM and disk when terms can be byte.

A simple solution is to create tokenizer factories which are KeywordTokenizer + [ICU]CollationAttributeFactory.

A better solution would be [ICU]CollationFieldTypes, as this would allow locale-sensitive
range queries, but I found this to be more difficult due to the fact that the indexed values
are byte[] not String...

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