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Posted to dev@lucene.apache.org by "Hoss Man (JIRA)" <ji...@apache.org> on 2015/11/30 22:57:11 UTC

[jira] [Commented] (LUCENE-6737) Add DecimalDigitFilter

    [ https://issues.apache.org/jira/browse/LUCENE-6737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15032556#comment-15032556 ] 

Hoss Man commented on LUCENE-6737:
----------------------------------

I think there may be a bug here for some digits ... created new issue LUCENE-6914 in case it's non trivial to fix and doesn't get resolved before 5.4 is released.

> Add DecimalDigitFilter
> ----------------------
>
>                 Key: LUCENE-6737
>                 URL: https://issues.apache.org/jira/browse/LUCENE-6737
>             Project: Lucene - Core
>          Issue Type: New Feature
>            Reporter: Robert Muir
>             Fix For: Trunk, 5.4
>
>         Attachments: LUCENE-6737.patch
>
>
> TokenFilter that folds all unicode digits (http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[:General_Category=Decimal_Number:]) to 0-9.
> Historically a lot of the impacted analyzers couldn't even tokenize numbers at all, but now they use standardtokenizer for numbers/alphanum tokens. But its usually the case you will find e.g. a mix of both ascii digits and "native" digits, and today that makes searching difficult.
> Note this only impacts *decimal* digits, hence the name DecimalDigitFilter. So no processing of chinese numerals or anything crazy like that.



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