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https://issues.apache.org/jira/browse/CASSANDRA-4295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13285778#comment-13285778
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Jonathan Ellis commented on CASSANDRA-4295:
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I suppose, but they'd be *relatively* static, so adding a "validated" boolean 
that we can negate when permissions change should be adequate.

Most (all?) production implementations of the auth API are going to call into a 
remote service to validate credentials, so that feels like something worth 
optimizing away if we can.
                
> move checkaccess into statement.prepare
> ---------------------------------------
>
>                 Key: CASSANDRA-4295
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4295
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: API
>    Affects Versions: 1.1.0
>            Reporter: Jonathan Ellis
>            Assignee: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 1.1.2
>
>
> there's no need to redo this every execution since the schema, tables, and 
> users involved should all be immutable

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