doc/modules/cassandra/examples/BNF/alter_udt_statement.bnf - cassandra - Git at Google

 alter_type_statement::= ALTER TYPE udt_name alter_type_modification
 alter_type_modification::= ADD field_definition
         | RENAME identifier TO identifier( identifier TO identifier )*
	alter_type_statement::= ALTER TYPE udt_name alter_type_modification
	alter_type_modification::= ADD field_definition
	\| RENAME identifier TO identifier( identifier TO identifier )*