[jira] [Updated] (CASSANDRA-6870) Transform operation

["Jeremy Hanna (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-6870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jeremy Hanna updated CASSANDRA-6870:
------------------------------------
    Labels: LWT  (was: )

> 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
>              Labels: LWT
>
> 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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