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https://issues.apache.org/jira/browse/CASSANDRA-19129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17928948#comment-17928948
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Bernardo Botella Corbi commented on CASSANDRA-19129:
----------------------------------------------------

I'd like to come back to this one. We have been discussing on adding a new 
system table for driver support of constraints (check this 
[Jira|https://issues.apache.org/jira/browse/CASSANDRA-20331]), and it seems 
that we want to use virtual tables instead. I am going to raise a question on 
the ML around how we want to approach this. I see two different approaches:
- Moving all the tables at once and making sure the driver can find them
- We take an incremental approach of moving one by one, splitting the work in 
chunks

If we decide to go with the latter, I will create all the required Jiras for 
the different tables.

> Virtualise system_schema
> ------------------------
>
>                 Key: CASSANDRA-19129
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-19129
>             Project: Apache Cassandra
>          Issue Type: New Feature
>          Components: Cluster/Schema
>            Reporter: Marcus Eriksson
>            Priority: Normal
>             Fix For: 5.x
>
>
> Schema no longer needs to use `system.schema` for persistence as current 
> schema is now part of {{ClusterMetadata}}. The existing tables have been 
> preserved for client compatibility but we should review this moving forward 
> and consider whether this could be switched to a virtual keyspace.



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