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https://issues.apache.org/jira/browse/CASSANDRA-9917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14695796#comment-14695796
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Paulo Motta commented on CASSANDRA-9917:
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so, if I understood correctly, we want to validate on CreateMVStatement if
baseTable.gcGraceSeconds < MIN_GC_GRACE_SECONDS, and also on
AlterTableStatement if baseTable.NewGcGraceSeconds < MIN_GC_GRACE_SECONDS, is
that correct? I will assume this is the case, please let me know if I should
validate in the actual write instead.
> MVs should validate gc grace seconds on the tables involved
> -----------------------------------------------------------
>
> Key: CASSANDRA-9917
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9917
> Project: Cassandra
> Issue Type: Bug
> Reporter: Aleksey Yeschenko
> Assignee: Paulo Motta
> Labels: materializedviews
> Fix For: 3.0.0 rc1
>
>
> For correctness reasons (potential resurrection of dropped values), batchlog
> entries are TTLs with the lowest gc grace second of all the tables involved
> in a batch.
> It means that if gc gs is set to 0 in one of the tables, the batchlog entry
> will be dead on arrival, and never replayed.
> We should probably warn against such LOGGED writes taking place, in general,
> but for MVs, we must validate that gc gs on the base table (and on the MV
> table, if we should allow altering gc gs there at all), is never set too low,
> or else.
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