| alter_table_statement::= ALTER TABLE [ IF EXISTS ] table_name alter_table_instruction | |
| alter_table_instruction::= ADD [ IF NOT EXISTS ] column_name cql_type ( ',' column_name cql_type )* | |
| | DROP [ IF EXISTS ] column_name ( column_name )* | |
| | RENAME [ IF EXISTS ] column_name to column_name (AND column_name to column_name)* | |
| | WITH options |