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Posted to commits@cassandra.apache.org by "T Jake Luciani (JIRA)" <ji...@apache.org> on 2015/09/03 19:45:46 UTC
[jira] [Commented] (CASSANDRA-10261) Materialized Views Timestamp
issues
[ https://issues.apache.org/jira/browse/CASSANDRA-10261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14729454#comment-14729454 ]
T Jake Luciani commented on CASSANDRA-10261:
--------------------------------------------
Pushed fix and test [here|https://github.com/tjake/cassandra/tree/tsbug]
I think this same approach would work for CASSANDRA-9664 so long as it gets the existing record.
> 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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