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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Updated: (CASSANDRA-1282) NumericType: comparator for integers of fixed and arbitrary length
Date Fri, 23 Jul 2010 18:29:52 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-1282?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-1282:
--------------------------------------

    Attachment:     (was: 1282-v4.txt)

> NumericType: comparator for integers of fixed and arbitrary length
> ------------------------------------------------------------------
>
>                 Key: CASSANDRA-1282
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1282
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Folke Behrens
>            Assignee: Folke Behrens
>             Fix For: 0.7 beta 1
>
>         Attachments: 0001-NumericType.patch.txt, 1282-v4.txt, trunk-1282-v3.txt, trunk-1282.txt
>
>
> Patch introduces a new column comparator: NumericType. It can compare signed integer
values of fixed (int, long) and arbitrary length (BigInteger). Both can be mixed. Leading
zero bytes or 0xFF bytes will be ignored and can safely be stripped on compaction.
> The trivial version uses "new BigInteger(byte[]).compareTo(new BigInteger(byte[]))" but
it's slower and fills up memory.
> The faster version operates completely on stack and should even obsolete LongType.

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