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From "Tyler Hobbs (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12605) Timestamp-order searching of sstables does not handle non-frozen UDTs, frozen collections correctly
Date Wed, 21 Sep 2016 19:00:23 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15510844#comment-15510844
] 

Tyler Hobbs commented on CASSANDRA-12605:
-----------------------------------------

Thank you.  The new runs look better.

> Timestamp-order searching of sstables does not handle non-frozen UDTs, frozen collections
correctly
> ---------------------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-12605
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12605
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Tyler Hobbs
>            Assignee: Tyler Hobbs
>
> {{SinglePartitionReadCommand.queryNeitherCountersNorCollections()}} is used to determine
whether we can search sstables in timestamp order.  We cannot use this optimization when there
are multicell values (such as unfrozen collections or UDTs).  However, this method only checks
{{column.type.isCollection() || column.type.isCounter()}}.  Instead, it should check {{column.type.isMulticell()
|| column.type.isCounter()}}.
> This has two implications:
> * We are using timestamp-order searching when querying non-frozen UDTs, which can lead
to incorrect/stale results being returned.
> * We are not taking advantage of this optimization when querying frozen collections.



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