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https://issues.apache.org/jira/browse/CASSANDRA-17495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17517740#comment-17517740
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Jon Meredith commented on CASSANDRA-17495:
------------------------------------------

PR looks good with a minor issue of missing the getAlterTableEnabled JMX 
endpoint.  Will approve the change once added.

> Add Guardrail for ALTER TABLE ADD / DROP / RENAME columns
> ---------------------------------------------------------
>
>                 Key: CASSANDRA-17495
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-17495
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Feature/Guardrails
>            Reporter: Josh McKenzie
>            Assignee: Josh McKenzie
>            Priority: Normal
>             Fix For: 4.x
>
>
> Operators should have the ability to freeze the schema of tables in place so 
> users can't mutate columns during various cluster operations. For an example 
> of some of the risks see CASSANDRA-13004.



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