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From "Robert Muir (JIRA)" <>
Subject [jira] Commented: (LUCENE-1793) remove custom encoding support in Greek/Russian Analyzers
Date Mon, 10 Aug 2009 09:27:14 GMT


Robert Muir commented on LUCENE-1793:

DM, you are right this is a better discussion for another issue/place
I was concerned that we would be taking functionality away, but this is not the case, as Uwe
says it is only "strange".

I just looked at all these encodings: they are all storing characters in the extended ascii
range (> 0x7F)
Therefore, anyone using this strange encoding support is using 2 bytes per character already!

For example someone using CP1251 in the russian analyzer is simply storing Ж as 0xC6, its
being represented as Æ. (2 bytes in UTF-8)
So, by deprecating these encodings for unicode, nobody's index size will double...

> remove custom encoding support in Greek/Russian Analyzers
> ---------------------------------------------------------
>                 Key: LUCENE-1793
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>          Components: contrib/analyzers
>            Reporter: Robert Muir
>            Priority: Minor
>         Attachments: LUCENE-1793.patch
> The Greek and Russian analyzers support custom encodings such as KOI-8, they define things
like Lowercase and tokenization for these.
> I think that analyzers should support unicode and that conversion/handling of other charsets
belongs somewhere else. 
> I would like to deprecate/remove the support for these other encodings.

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