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From "Shehzaad Nakhoda (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (PHOENIX-4237) Allow sorting on (Java) collation keys for non-English locales
Date Fri, 03 Nov 2017 07:49:00 GMT

     [ https://issues.apache.org/jira/browse/PHOENIX-4237?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shehzaad Nakhoda updated PHOENIX-4237:
--------------------------------------
    Comment: was deleted

(was: A new patch that removes external code and uses maven dependencies to bring in external
files.)

> Allow sorting on (Java) collation keys for non-English locales
> --------------------------------------------------------------
>
>                 Key: PHOENIX-4237
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-4237
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: Shehzaad Nakhoda
>            Assignee: Shehzaad Nakhoda
>            Priority: Major
>             Fix For: 4.12.0
>
>         Attachments: PHOENIX-4237_v1.patch, PHOENIX-4237_v2.patch, PHOENIX-4237_v3.patch
>
>
> Strings stored via Phoenix can be composed from a subset of the entire set of Unicode
characters. The natural sort order for strings for different languages often differs from
the order dictated by the binary representation of the characters of these strings. Java provides
the idea of a Collator which given an input string and a (language) locale can generate a
Collation Key which can then be used to compare strings in that natural order.
> Salesforce has recently open-sourced grammaticus. IBM has open-sourced ICU4J some time
ago. These technologies can be combined to provide a robust new Phoenix function that can
be used in an ORDER BY clause to sort strings according to the user's locale.



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