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From "Ed Anuff (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2231) Add CompositeType comparer to the comparers provided in org.apache.cassandra.db.marshal
Date Wed, 13 Apr 2011 16:30:07 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2231?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13019419#comment-13019419
] 

Ed Anuff commented on CASSANDRA-2231:
-------------------------------------

If you can add the -1, 0, 1 e-o-c suggestion, then I'm good with this.  We've been using a
preview version of your patch that we put up at https://github.com/riptano/hector-composite
to make sure it works. So far it seems to meet every use case, with the exception of the previous
questions from April 4 which you correctly pointed out couldn't be solved the way we were
suggesting.  So, I'm all for getting this out as soon as possible.  

> 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: Improvement
>          Components: Contrib
>    Affects Versions: 0.7.3
>            Reporter: Ed Anuff
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 0.7.5
>
>         Attachments: 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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