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From "Aleksey Yeschenko (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7622) Implement virtual tables
Date Wed, 04 Apr 2018 15:53:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16425756#comment-16425756
] 

Aleksey Yeschenko commented on CASSANDRA-7622:
----------------------------------------------

The right level of abstraction, for both this and pluggable storage, is on keyspace level.
The basic write unit we have is a {{Mutation}}, and you have to accept this. What would not
be acceptable is if-else conditions in {{Keyspace.apply()}} depending on what the kind of
table this is.

Additionally, all tables in a keyspace by definition share the same replication strategy and
params, and I just don't see how you can mix and match regular and virtual ones in the same
keyspace.

> Implement virtual tables
> ------------------------
>
>                 Key: CASSANDRA-7622
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7622
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: CQL
>            Reporter: Tupshin Harper
>            Assignee: Chris Lohfink
>            Priority: Major
>             Fix For: 4.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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