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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7622) Implement virtual tables
Date Wed, 08 Jun 2016 16:39:21 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15320891#comment-15320891
] 

Robert Stupp commented on CASSANDRA-7622:
-----------------------------------------

I'm with you, that sth like SHOW VARIABLES would be used from cqlsh. But the node just added
as the initial contact point. When that node fails, the statement would be silently executed
against another node. For SHOW VARIABLES this is not super dramatic - but for an ALTER SYSTEM
DECOMMISSION it is. That's why I proposed {{WHERE node='1.2.3.4'}} as part of the syntax.
At least, the coordinator can check, whether it finds its own IP in the WHERE clause.

> Implement virtual tables
> ------------------------
>
>                 Key: CASSANDRA-7622
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7622
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Tupshin Harper
>            Assignee: Jeff Jirsa
>             Fix For: 3.x
>
>
> There are a variety of reasons to want virtual tables, which would be any table that
would be backed by an API, rather than data explicitly managed and stored as sstables.
> One possible use case would be to expose JMX data through CQL as a resurrection of CASSANDRA-3527.
> Another is a more general framework to implement the ability to expose yaml configuration
information. So it would be an alternate approach to CASSANDRA-7370.
> A possible implementation would be in terms of CASSANDRA-7443, but I am not presupposing.



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