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https://issues.apache.org/jira/browse/CASSANDRA-11147?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Aleksey Yeschenko resolved CASSANDRA-11147.
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Resolution: Duplicate
> support alter table add if not exists
> -------------------------------------
>
> Key: CASSANDRA-11147
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11147
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jon Haddad
>
> Keeping database schema up to date is a pain when needing to check if column
> definitions are already set. Since we already have if not exists for create
> table & keyspace, I think it's only logical to add for adding columns.
> For example:
> {code}
> ALTER TABLE whatever add if not exists name int;
> {code}
> This would let a team treat a series of DDL statements as an append only
> commit log of CQL statements.
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