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From "Matthew F. Dennis (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-1282) NumericType: comparator for integers of fixed and arbitrary length
Date Tue, 20 Jul 2010 15:57:50 GMT


Matthew F. Dennis updated CASSANDRA-1282:

    Attachment: trunk-1282.txt

trunk-1282.txt also reverses the sort order of null in the original patch to be consistent
with org.apache.commons.lang.builder.CompareToBuilder (in other words, null is less-than non-null).

> NumericType: comparator for integers of fixed and arbitrary length
> ------------------------------------------------------------------
>                 Key: CASSANDRA-1282
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Folke Behrens
>            Assignee: Folke Behrens
>             Fix For: 0.7
>         Attachments: 0001-NumericType.patch.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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