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https://issues.apache.org/jira/browse/CASSANDRA-16806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17402819#comment-17402819
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Aleksei Zotov commented on CASSANDRA-16806:
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[~blerer]
I made some progress and I'd like to verify the direction I'm moving towards.
My idea is to introduce {{AbstractWritableVirtualTable}} class that is
responsible for handling modifications on a granular level. A developer will
have to implement necessary methods that they want to support in their VT. Here
it is:
https://github.com/apache/cassandra/pull/1117/files#diff-850203d5ef3453529dd861d4d9ee487fd908ab4bd29177be5c70fcd0b58be3c4
I've also updated the tests, the approach seems to be working fine for every
use case. However, I'd like to pay attention to
{{ModificationStatement.validate}} and {{DELETE statements must restrict all
PRIMARY KEY columns}}. In the meantime, could you please provide some initial
feedback.
> Allow TRUNCATE to work on Virtual Tables if the implementation allows it
> ------------------------------------------------------------------------
>
> Key: CASSANDRA-16806
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16806
> Project: Cassandra
> Issue Type: Improvement
> Components: Feature/Virtual Tables
> Reporter: Benjamin Lerer
> Assignee: Aleksei Zotov
> Priority: Normal
> Fix For: 4.x
>
> Time Spent: 1h 20m
> Remaining Estimate: 0h
>
> {{TRUNCATE}} statements are currently not supported by Virtual Tables. For
> some Virtual Tables it makes sense to allow it.
> It can be done by adding a {{truncate}} method to the {{VirtualTable}}
> interface and calling that method from {{TruncateStatement}}. The default
> implementation of the method should be to fire an {{InvalidRequestException}}
> saying that truncate is not supported on that specific table.
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