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From "Tyler Hobbs (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-10796) Views do not handle single-column deletions of view PK columns correctly
Date Thu, 03 Dec 2015 16:43:11 GMT


Tyler Hobbs commented on CASSANDRA-10796:

Thanks. I've removed the unused import and added the suggested test cases.  I'm still seeing
timeout problems with the dtests, so I've merged in the latest 3.0/3.1/trunk and scheduled
a new test run.

> Views do not handle single-column deletions of view PK columns correctly
> ------------------------------------------------------------------------
>                 Key: CASSANDRA-10796
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Coordination
>            Reporter: Tyler Hobbs
>            Assignee: Tyler Hobbs
>             Fix For: 3.0.1, 3.1
> When a materialized view has a regular base column in its primary key, and that regular
base column is deleted through a single-column deletion, the view does not handle it correctly,
and may produce an error.
> For example, with a table like:
> {noformat}
>     a int, b int, c int, d int
>     PRIMARY KEY (a, b)
> )
> {noformat}
> and a view like:
> {noformat}
>     AS SELECT * FROM foo
>     WHERE ...
>     PRIMARY KEY (a, d, b)
> {noformat}
> a deletion like this will not be handled correctly:
> {noformat}
> DELETE d FROM foo WHERE a = 0 AND b = 0
> {noformat}
> The source of the problem is that we aren't checking whether individual cells in the
TemporalRow are live or not when building the clustering and partition key for the row.  Instead,
we're just using the cell value, which is an empty ByteBuffer.
> I should have a patch with a fix and tests posted tomorrow.

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