[jira] [Created] (CASSANDRA-16916) Add support for IF EXISTS and IF NOT EXISTS in ALTER statements

["Benjamin Lerer (Jira)" <ji...@apache.org>]

Benjamin Lerer created CASSANDRA-16916:
------------------------------------------

             Summary: Add support for IF EXISTS and IF NOT EXISTS in ALTER statements
                 Key: CASSANDRA-16916
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-16916
             Project: Cassandra
          Issue Type: Improvement
          Components: CQL/Syntax
            Reporter: Benjamin Lerer


It would make sense to add support for {{IF EXISTS}} and {{IF NOT EXISTS}} in the different {{ALTER}} statements. 

For example:
* {{ALTER TABLE IF EXISTS myTable ...}}
* {{ALTER TABLE myTable ADD IF NOT EXISTS ...}}
* {{ALTER TABLE myTable DROP IF EXISTS ...}}
* {{ALTER TYPE IF EXISTS myType ...}}
* {{ALTER TYPE myType ADD IF NOT EXISTS ...}}

+Additional info for newcomers:+

In order to implement this change you will need to change the {{Parser.g}} ANTLR file located in the src/antlr directory and the java classes corresponding to the different alter statements located in the {{org.apache.cassandra.cql3.statements.schema}} package. You can look at the CreateTableStatement class to see how it was done there.
The unit test for the CQL logic are located under {{org.apache.cassandra.cql3.validation}}



--
This message was sent by Atlassian Jira
(v8.3.4#803005)

---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@cassandra.apache.org
For additional commands, e-mail: commits-help@cassandra.apache.org