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https://issues.apache.org/jira/browse/CASSANDRA-3657?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sylvain Lebresne updated CASSANDRA-3657:
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Attachment: 0001-Allow-compatible-comparator-changes-v2.patch
Ok, I actually forgot to do the actual replacement of the comparator, I was
only validating the replacement was legal, without changing it.
Now, because CFMetadata.apply() apply changes directly to the current
CFMetadata (instead of creating a new one and replacing the old one with it),
it means this patch has to make comparator and subComparator non-final anymore.
I think we should probably change CFMetadata.apply() however, because that
means that currently CF udpate are not applied atomically, which is not a huge
deal but will cause problem someday. I want to see how CASSANDRA-1391 changes
that however before creating a ticket/writing a patch.
> Allow extending CompositeType comparator
> ----------------------------------------
>
> Key: CASSANDRA-3657
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3657
> Project: Cassandra
> Issue Type: New Feature
> Components: API, Core
> Affects Versions: 0.8.1
> Reporter: Jonathan Ellis
> Assignee: Sylvain Lebresne
> Priority: Critical
> Fix For: 1.1
>
> Attachments: 0001-Allow-compatible-comparator-changes-v2.patch,
> 0001-Allow-compatible-comparator-changes.patch
>
>
> Quoting Sylvain from CASSANDRA-2474,
> bq. if you declare a comparator like CompositeType(IntType, UUIDType,
> UTF8Type), you can have columns that have only some prefix of the component
> (typically '42:92d21d0a-d6cb-437c-9d3f-b67aa733a19f' is a valid column name
> for that comparator), and as a consequence it would be possible to allow
> 'extend' the preceding comparator to say CompositeType(IntType, UUIDType,
> UTF8Type, IntType)
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