[jira] [Created] (IGNITE-19612) Drop IF EXISTS clause from add/drop column syntax.

[Andrey Mashenkov (Jira)]

Andrey Mashenkov created IGNITE-19612:
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             Summary: Drop IF EXISTS clause from add/drop column syntax.
                 Key: IGNITE-19612
                 URL: https://issues.apache.org/jira/browse/IGNITE-19612
             Project: Ignite
          Issue Type: Improvement
            Reporter: Andrey Mashenkov


Using IF EXISTS/IF NOT EXISTS clause in ADD/DROP COLUMN DDL command looks 
ambiguous when adding/dropping multiple columns.

Let's drop IF EXISTS/IF NOT EXITST clause support SQL syntax and drop ifExists 
flags from AlterTableAddCommand, AlterTableDropCommand classes.




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