[jira] [Commented] (CASSANDRA-3647) Support set and map value types in CQL

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-3647?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13288667#comment-13288667 ] 

Jonathan Ellis commented on CASSANDRA-3647:
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bq. Not sure that we can really support lists meaningfully

I think I'm leaning back towards supporting lists again.  While we can't do random-access against lists, none of the document databases out there do either; fetching L[3] fetches all of L, and updating L[3] = foo rewrites all of L.

And having syntactic sugar for a Map whose keys are timeuuids is just very useful syntactic sugar.

So if we make this explicit -- that the operations allowed are simply appending, fetching the entire list, and overwriting the entire list (which we can do by writing a composite tombstone, plus the new list items) then I think we're in good shape.
                
> Support set and map value types in CQL
> --------------------------------------
>
>                 Key: CASSANDRA-3647
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3647
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: API, Core
>            Reporter: Jonathan Ellis
>              Labels: cql
>
> Composite columns introduce the ability to have arbitrarily nested data in a Cassandra row.  We should expose this through CQL.

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