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https://issues.apache.org/jira/browse/CASSANDRA-12868?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15687498#comment-15687498
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Sundar Srinivasan commented on CASSANDRA-12868:
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Thanks, Sylvain!
> Reject default_time_to_live option when creating or altering MVs
> ----------------------------------------------------------------
>
> Key: CASSANDRA-12868
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12868
> Project: Cassandra
> Issue Type: Bug
> Reporter: Srinivasarao Daruna
> Assignee: Sundar Srinivasan
> Priority: Minor
> Labels: lhf
> Attachments: 12868-trunk.txt
>
>
> Hi,
> By default, materialized views are using the TTL of primary table,
> irrespective of the configured value provided in materialized view creation.
> For eg:
> table:
> CREATE TABLE test2(id text, date text, col1 text,col2 text, PRIMARY
> KEY(id,date)) WITH default_time_to_live = 60 AND CLUSTERING ORDER BY (date
> DESC);
> CREATE MATERIALIZED VIEW test3_view AS
> SELECT id, date, col1
> FROM test3
> WHERE id IS NOT NULL AND date IS NOT NULL
> PRIMARY KEY(id,date) WITH default_time_to_live = 30;
> The queries are accepted in CQL. As per the detail, it should use 30 seconds
> for Materialized view and 60 seconds for parent table.
> But, it is always 60 seconds (as the parent table)
> case 1:
> parent table and materialized view with different TTL
> MV will always have the TTL of parent.
> case 2:
> Parent table without TTL but materialized view with TTL
> MV does not have the TTL even though the configuration has been accepted in
> the table creation.
> Expected:
> Either the TTL configuration should not be accepted in the materialized view
> creation, if it is of no value.
> Or
> TTL has to be applied differently for both Materialized View and Table if the
> configuration is added.
> If no configuration, TTL has to be taken from the parent table.
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