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https://issues.apache.org/jira/browse/CASSANDRA-6710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14616487#comment-14616487
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Robert Stupp commented on CASSANDRA-6710:
-----------------------------------------

Fair enough.
IMO the most important _con_ you mentioned is to learn CQL for newcomers as 
well as for experienced people learning the amount of new features.

> Support union types
> -------------------
>
>                 Key: CASSANDRA-6710
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6710
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: API, Core
>            Reporter: Tupshin Harper
>            Priority: Minor
>              Labels: ponies
>             Fix For: 3.x
>
>
> I sometimes find myself wanting to abuse Cassandra datatypes when I want to 
> interleave two different types in the same column.
> An example is in CASSANDRA-6167 where an approach is to tag what would 
> normally be a numeric field with text indicating that it is special in some 
> ways.
> A more elegant approach would be to be able to explicitly define disjoint 
> unions in the style of Haskell's and Scala's Either types.



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