oracle表通过存储方式for循环创建N列

oracle表名，列名最大长度都为30字节

create or replace procedure addrows is

vsql VARCHAR2(100);
begin
  for i in 10 ..56 loop
    vsql := 'ALTER TABLE zmltest_1234567890123456789012 ADD colname_1234567890123456789b'||i||' varchar(50)';
  execute immediate vsql;
  end loop;
end addrows;

set serveroutput on

exec addrows