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From "Aleksey Yeschenko (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-7248) Tuple type
Date Mon, 19 May 2014 14:33:38 GMT


Aleksey Yeschenko commented on CASSANDRA-7248:

I don't think it is. You can emulate 6710 w/ tuples, but it's not a direct clone.

> Tuple type
> ----------
>                 Key: CASSANDRA-7248
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>              Labels: cql3
>             Fix For: 2.1 rc1
> For CASSANDRA-6875 we need to be able to talk about tuples values and types (for prepared
variables). Since we need it there, clients will need to support them anyway and so I think
it would be a lot cleaner to start supporting those more generally. Besides, having tuples
is a relatively simple and natural extension to what we have. I'll note in particular that
tuple have a close relationship to user type in the sense that a tuple will be really just
like an anonymous with no name for the fields and in particular a tuple value will be the
same than a user type value.
> The syntax would simply look like that:
> {noformat}
>     k int PRIMARY KEY,
>     v tuple<int, text, float>
> )
> INSERT INTO foo(k, v) VALUES(0, (3, 'bar', 2.1));
> {noformat}
> We can also add projections in selects if we want:
> {noformat}
> SELECT v[0], v[2] FROM foo WHERE k = 0;
> {noformat}
> but that can come later (after all, we still don't have projections for collections and
it's not a big deal).

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