[jira] [Assigned] (CASSANDRA-21451) Support DDL batches

["guo Maxwell (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-21451?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

guo Maxwell reassigned CASSANDRA-21451:
---------------------------------------

    Assignee: guo Maxwell

> Support DDL batches
> -------------------
>
>                 Key: CASSANDRA-21451
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21451
>             Project: Apache Cassandra
>          Issue Type: New Feature
>            Reporter: Dmitry Konstantinov
>            Assignee: guo Maxwell
>            Priority: Normal
>
> If a schema is complicated and contains a lot of tables and UDTs then it can take a lot of time to apply DDLs one by one, especially on low level dev environments.
> To speedup the schema applying we can batch DDLs together, so we can amortize network interaction, flushing and transaction coordination time.
> Current logic and protocol for a schema change apply is already generic and ready for it.
> The change is only needed in CQL parsing and interpretation level.
> In case of TCM we can some DDLs in parallel but it is more complicated from a client side because it requires topological sorting or the changes.



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