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https://issues.apache.org/jira/browse/CASSANDRA-1773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12936023#action_12936023
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Pavel Yaskevich commented on CASSANDRA-1773:
--------------------------------------------

Should we be using subcomparator for columns of the column family marked as 
"Super" instead of using comparator?

> Prevent creation of column_metadata inconsistent with comparator
> ----------------------------------------------------------------
>
>                 Key: CASSANDRA-1773
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1773
>             Project: Cassandra
>          Issue Type: Improvement
>    Affects Versions: 0.7.0 rc 1
>            Reporter: Jonathan Ellis
>            Assignee: Pavel Yaskevich
>            Priority: Minor
>             Fix For: 0.7.0
>
>         Attachments: CASSANDRA-1773.patch
>
>
> {code}
> create keyspace clitest with replication_factor = 1 and placement_strategy = 
> 'org.apache.cassandra.locator.SimpleStrategy';
> use clitest;
> create column family bar with column_type = 'Super' and comparator = 
> 'TimeUUIDType' and subcomparator = 'UTF8Type';
> create column family foo with column_type = 'Super' and comparator = 
> 'TimeUUIDType' and subcomparator = 'UTF8Type' and 
> column_metadata=[{column_name:col1, validation_class:UTF8Type}, 
> {column_name:col2, validation_class:UTF8Type}];
> {code}
> then, "describe keyspace clitest" will give "UUIDs must be exactly 16 bytes" 
> because it tries to run "col1" through the comparator getString.
> We should check that column names in metadata match the comparator when 
> updating metadata, and also check that the column names are sane if we update 
> the comparator itself.

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