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Date: Thu, 9 Jun 2011 14:17:59 +0000 (UTC)
From: "donal zang (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (CASSANDRA-2231) Add CompositeType comparer to the
 comparers provided in org.apache.cassandra.db.marshal
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     [ https://issues.apache.org/jira/browse/CASSANDRA-2231?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

donal zang updated CASSANDRA-2231:
----------------------------------

    Comment: was deleted

(was: No, there's no bytes remaining after 0x01.
The exception is raised in the validate(ByteBuffer bytes) function:

215             byte b = bb.get();
216             if (b != 0 && bb.remaining() != 0)
217                 throw new MarshalException("Invalid bytes remaining after an end-of-component at component" +i);

that means if the byte is not 0x00, then this Exception will be raised?

correct me if I am wrong)

> Add CompositeType comparer to the comparers provided in org.apache.cassandra.db.marshal
> ---------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-2231
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2231
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Contrib
>            Reporter: Ed Anuff
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 0.8.1
>
>         Attachments: 0001-Add-compositeType-and-DynamicCompositeType-v2.patch, 0001-Add-compositeType-and-DynamicCompositeType-v3.patch, 0001-Add-compositeType-and-DynamicCompositeType-v4.patch, 0001-Add-compositeType-and-DynamicCompositeType_0.7.patch, CompositeType-and-DynamicCompositeType.patch, edanuff-CassandraCompositeType-1e253c4.zip
>
>
> CompositeType is a custom comparer that makes it possible to create comparable composite values out of the basic types that Cassandra currently supports, such as Long, UUID, etc.  This is very useful in both the creation of custom inverted indexes using columns in a skinny row, where each column name is a composite value, and also when using Cassandra's built-in secondary index support, where it can be used to encode the values in the columns that Cassandra indexes.  One scenario for the usage of these is documented here: http://www.anuff.com/2010/07/secondary-indexes-in-cassandra.html.  Source for contribution is attached and has been previously maintained on github here: https://github.com/edanuff/CassandraCompositeType

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