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https://issues.apache.org/jira/browse/CASSANDRA-223?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jonathan Ellis updated CASSANDRA-223:
-------------------------------------

    Attachment: 223-2.patch

add brute-force fix for the bug: always merge in results from all memtables and 
sstables.  (this is what bigtable does.)

> 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.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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