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https://issues.apache.org/jira/browse/CASSANDRA-3974?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496334#comment-13496334
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Jonathan Ellis commented on CASSANDRA-3974:
-------------------------------------------

If we use ttl <= 0 as a signal to use the default ttl in CF.addColumn, how do 
we override the default to be "no ttl at all?"  Should we treat 
Integer.MAX_VALUE as "don't use the default, just give me a non-expiring 
Column?"

Does UpdateStatement go through addColumn eventually?  If so we are duplicating 
code there.  If not that makes me a bigger fan of centralizing this in a 
factory method.  (Guess we can leave the other constructors alone.)
                
> Per-CF TTL
> ----------
>
>                 Key: CASSANDRA-3974
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3974
>             Project: Cassandra
>          Issue Type: New Feature
>    Affects Versions: 1.2.0 beta 1
>            Reporter: Jonathan Ellis
>            Assignee: Kirk True
>            Priority: Minor
>             Fix For: 1.2.0 rc1
>
>         Attachments: trunk-3974.txt, trunk-3974v2.txt, trunk-3974v3.txt, 
> trunk-3974v4.txt, trunk-3974v5.txt, trunk-3974v6.txt, trunk-3974v7.txt
>
>
> Per-CF TTL would allow compaction optimizations ("drop an entire sstable's 
> worth of expired data") that we can't do with per-column.

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