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From "Sylvain Lebresne (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4084) Better validator support for composite comparator CFs
Date Tue, 27 Mar 2012 08:05:40 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4084?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13239295#comment-13239295
] 

Sylvain Lebresne commented on CASSANDRA-4084:
---------------------------------------------

This is already supported by CQL3 I believe, unless I'm not understanding this correctly (I
did not understood what wildcard had to do with validators though so maybe I did misunderstood
the idea).
                
> Better validator support for composite comparator CFs
> -----------------------------------------------------
>
>                 Key: CASSANDRA-4084
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4084
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Tyler Hobbs
>            Priority: Minor
>
> Perhaps this should be part of replacing super columns with composites, but we essentially
need something analogous to sub-column validators for when composites are used in a way that's
similar to super columns (multiple fields for each "super column" in a row).  As an example
use case, suppose you have a wide row holding users where the comparator is (<user_id>,
<field>), and <field> might be either "name" or "age"; ideally, you can validate
"name" as UT8Type and "age" as IntegerType.
> Allowing wildcards to be used for components in the column name portion of the ColumnDef
might be a reasonable approach.

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