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Date: Thu, 10 Sep 2015 17:03:46 +0000 (UTC)
From: "Tyler Hobbs (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
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Subject: [jira] [Commented] (CASSANDRA-10261) Materialized Views Timestamp
 issues
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    [ https://issues.apache.org/jira/browse/CASSANDRA-10261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14739124#comment-14739124 ] 

Tyler Hobbs commented on CASSANDRA-10261:
-----------------------------------------

+1 on the code changes.  Once we get a good dtest run with the latest 3.0 merged in, this should be good to commit (assuming the tests pass).

One nit that you can fix when committing: in BTreeRow, there's still a reference to a "weak deletion".

> Materialized Views Timestamp issues
> -----------------------------------
>
>                 Key: CASSANDRA-10261
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10261
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: T Jake Luciani
>            Assignee: T Jake Luciani
>             Fix For: 3.0.0 rc1
>
>
> As [~thobbs] [mentioned|https://issues.apache.org/jira/browse/CASSANDRA-9664?focusedCommentId=14724150&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-14724150] in CASSANDRA-9664 there are issues dealing with updates to individual cells which can mask data from the base table in the view when trying to filter data correctly in the view.  
> Unfortunately, this same issue exists for all MV tables with regular columns.
> In the earlier versions of MV we did have a fix for this which I now can see is ineffective for all situations.
> I've pushed some unit tests to show the issue (similar to tylers) and a fix.  The idea is we keep the base table's timestamps per cell as it so we can *always* tell (per replica) which version of the record is the latest.  Since the base table *always* writes the entire record to the view (part of our earlier partial fix) we can ensure the view record contains *at least* views primary key timestamp.  


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