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From "Sylvain Lebresne (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-4217) Easy access to column timestamps (and maybe ttl) during queries
Date Fri, 04 May 2012 15:26:58 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-4217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sylvain Lebresne updated CASSANDRA-4217:
----------------------------------------

    Attachment: 4217.txt

I'll agree with Jonathan that general functions support is more work than I want to put here.
Nor is it my top priority either to be honest (I don't see that as a necessity for a final
version of CQL 3.0.0).

Anyway, attaching patch for this. For the timestamp, I've picked writetime(x) currently, though
thinking of it now I realize it is slightly incoherent with the fact that we use 'USING TIMESTAMP'
to specify it at insert time, so maybe timestampof is better. Anyway, that will be trivial
to change to whatever we settle for. 
                
> Easy access to column timestamps (and maybe ttl) during queries
> ---------------------------------------------------------------
>
>                 Key: CASSANDRA-4217
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4217
>             Project: Cassandra
>          Issue Type: Sub-task
>          Components: API
>    Affects Versions: 1.1.0
>            Reporter: Sylvain Lebresne
>            Assignee: Sylvain Lebresne
>              Labels: cql3
>             Fix For: 1.1.1
>
>         Attachments: 4217.txt
>
>
> It would be interesting to allow accessing the timestamp/ttl of a column though some
syntax like
> {noformat}
> SELECT key, value, timestamp(value) FROM foo;
> {noformat}
> and the same for ttl.
> I'll note that currently timestamp and ttl are returned in the resultset because it includes
thrift Column object, but adding such syntax would make our future protocol potentially simpler
as we wouldn't then have to care about timestamps explicitely (and more compact in general
as we would only return timestamps when asked)

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