cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6870) Transform operation
Date Tue, 18 Mar 2014 21:50:45 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13939852#comment-13939852
] 

Jonathan Ellis commented on CASSANDRA-6870:
-------------------------------------------

I don't think this gets us very close to real UDF support (http://www.postgresql.org/docs/9.3/static/sql-createfunction.html)
but I'm not sure you want to block on that.  If ZADD is your goal I think we'd be okay with
hardcoding some functions to start with. [~slebresne] [~thobbs]?

> 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.



--
This message was sent by Atlassian JIRA
(v6.2#6252)

Mime
View raw message