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From "Pavel Yaskevich (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-2474) CQL support for compound columns
Date Mon, 19 Dec 2011 22:11:30 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-2474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13172670#comment-13172670
] 

Pavel Yaskevich commented on CASSANDRA-2474:
--------------------------------------------

Here is another option for this:

{code}
TRANSPOSED AS (<column> ?MODIFIER(<comparator>), ....) 
{code}

where MODIFIER = SPARSE | DENSE and <comparator> = utf8, int, uuid, timeuuid, ...; if
no MODIFIER set then MODIFIER = DENSE(default_type)

{code}
CREATE TABLE timeline (
    userid int primary key,
    posted_at uuid,
    posted_by int,
    body text,
    "92d21d0a-d6cb-437c-9d3f-b67aa733a19f" bigint
) TRANSPOSED AS (posted_at, posted_by SPARSE, 92d21d0a-d6cb-437c-9d3f-b67aa733a19f" DENSE(uuid),
body SPARSE);
{code}
                
> CQL support for compound columns
> --------------------------------
>
>                 Key: CASSANDRA-2474
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2474
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: API, Core
>            Reporter: Eric Evans
>            Assignee: Pavel Yaskevich
>              Labels: cql
>             Fix For: 1.1
>
>         Attachments: 2474-transposed-1.PNG, 2474-transposed-raw.PNG, 2474-transposed-select.PNG,
screenshot-1.jpg, screenshot-2.jpg
>
>
> For the most part, this boils down to supporting the specification of compound column
names (the CQL syntax is colon-delimted terms), and then teaching the decoders (drivers) to
create structures from the results.

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