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Edward Capriolo commented on CASSANDRA-6870:
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{noformat}
I am fine with postponing implementation of this to another ticket, but I do
think we should settle on the syntax ahead of time so that we don't
accidentally make extending it harder than necessary.{noformat}
I am ok with waiting. I think it make sense to add something to the storage
proxy that everyone is comfortable with and that CQL can use without much hoop
jumping later on.
> Transform operation
> -------------------
>
> Key: CASSANDRA-6870
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6870
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Edward Capriolo
> Assignee: Edward Capriolo
> Priority: Minor
>
> Compare and swap uses paxos to only update a value only if some criteria is
> met. If I understand correctly we should be able to use this feature to
> provide a wider variety of server side operations.
> For example inside a paxos transaction performing a slice and then using a
> function to manipulate the slice. You could accomplish features like append
> and increment this way without user needing to know the current value.
> I took a stab at doing this. I **think** I did it correctly. Comments welcome.
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