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From "Robin Schumacher (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-9200) Sequences
Date Mon, 18 May 2015 17:32:01 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-9200?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14548355#comment-14548355
] 

Robin Schumacher commented on CASSANDRA-9200:
---------------------------------------------

Unfortunately, I don't have a lot of detail on how customers want to use them. Current requests
come from Target, Family Search, and Openwave. My notes just say they've tried counters and
instead want Oracle-like sequences. If more detail is needed, we can try and go back to them
to see if more info can be had. Lastly, this isn't a constantly recurring request so not exactly
a white hot priority. 

> Sequences
> ---------
>
>                 Key: CASSANDRA-9200
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9200
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Jonathan Ellis
>            Assignee: Robert Stupp
>             Fix For: 3.x
>
>
> UUIDs are usually the right choice for surrogate keys, but sometimes application constraints
dictate an increasing numeric value.
> We could do this by using LWT to reserve "blocks" of the sequence for each member of
the cluster, which would eliminate paxos contention at the cost of not being strictly increasing.
> PostgreSQL syntax: http://www.postgresql.org/docs/9.4/static/sql-createsequence.html



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