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From "Chris Lohfink (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-7622) Implement virtual tables
Date Fri, 27 Apr 2018 05:00:01 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-7622?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16455767#comment-16455767
] 

Chris Lohfink commented on CASSANDRA-7622:
------------------------------------------

While waiting for other implementation, made some changes on some feedback out of band:
 * Use same QueryPager as other ReadCommands
 * Remove virtual tables from the system_schema.tables. Moved into \{{system_schemas.virtual_tables}}.
The drivers will need to add the TableMetadata from that in order to have it in own metadata,
for cqlsh I added a temp override until it exists in driver to make easier to play with.
 * Added the missed support for IN on partitions (so can do relations or IN clause for partition
key, or both on parts of key). I think this can be done better but seems to function on things
Ive thought of.
 * Some minor cleaning/renaming

||branch||tests||
|[trunk|https://github.com/clohfink/cassandra/tree/7622]|[tests|[https://circleci.com/gh/clohfink/cassandra/92|https://circleci.com/gh/clohfink/cassandra/104]]| 

> 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
>
>         Attachments: screenshot-1.png
>
>
> 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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