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https://issues.apache.org/jira/browse/CASSANDRA-223?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12724612#action_12724612
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Jun Rao commented on CASSANDRA-223:
-----------------------------------
The patch looks good to me.
> time-based slicing does not work correctly w/ "historial" memtables
> -------------------------------------------------------------------
>
> Key: CASSANDRA-223
> URL: https://issues.apache.org/jira/browse/CASSANDRA-223
> Project: Cassandra
> Issue Type: Bug
> Reporter: Jonathan Ellis
> Attachments: 223-2-v2.patch, 223-2.patch, 223.patch
>
>
> TimeFilter assumes that it is done as soon as it finds a column stamped
> earlier than what it is filtering on, but when you have a group of
> "historical" memtables whose columns were written in an arbitrary order this
> is not a safe assumption.
> It is not even a safe assumption when dealing with a single memtable +
> sstable pair, as the attached new test shows.
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