create_table_as_stmt ::=
	'CREATE' 'TABLE' table_name '(' name ( ( ',' name ) )* ')' 'AS' select_stmt
	| 'CREATE' 'TABLE' table_name  'AS' select_stmt
	| 'CREATE' 'TABLE' 'IF' 'NOT' 'EXISTS' table_name '(' name ( ( ',' name ) )* ')' 'AS' select_stmt
	| 'CREATE' 'TABLE' 'IF' 'NOT' 'EXISTS' table_name  'AS' select_stmt
