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https://issues.apache.org/jira/browse/CASSANDRA-5149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13679598#comment-13679598
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Aleksey Yeschenko commented on CASSANDRA-5149:
----------------------------------------------

I wasn't clear enough. I'm talking about read request timestamps, not column 
timestamps. And I'm saying that to transfrom is not always correct, in the 
context of 5149. But *not to* transfrom is perfectly all right.
                
> Respect slice count even if column expire mid-request
> -----------------------------------------------------
>
>                 Key: CASSANDRA-5149
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5149
>             Project: Cassandra
>          Issue Type: Bug
>    Affects Versions: 0.7.0
>            Reporter: Sylvain Lebresne
>            Assignee: Aleksey Yeschenko
>             Fix For: 2.0
>
>
> This is a follow-up of CASSANDRA-5099.
> If a column expire just while a slice query is performed, it is possible for 
> replicas to count said column as live but to have the coordinator seeing it 
> as dead when building the final result. The effect that the query might 
> return strictly less columns that the requested slice count even though there 
> is some live columns matching the slice predicate but not returned in the 
> result.

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