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https://issues.apache.org/jira/browse/CASSANDRA-16936?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17424420#comment-17424420
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Benedict Elliott Smith commented on CASSANDRA-16936:
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[Patch|https://github.com/belliottsmith/cassandra/tree/16936-trunk]
> Support atomic addition and append for LWTs
> -------------------------------------------
>
> Key: CASSANDRA-16936
> URL: https://issues.apache.org/jira/browse/CASSANDRA-16936
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Benedict Elliott Smith
> Priority: Normal
>
> To support CEP-10 we require some atomic functionality that modifies the
> state of a register as part of the transaction. Specifically, we require at
> least the ability to append a string to another string. Since this is more
> widely useful, at the same time we also support addition on numeric fields so
> that users may maintain precise counters using Paxos, should they wish.
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