mysql生成一个千万行的表

CREATE TABLE usertb (  
id serial,   
uname  varchar(20) ,  
ucreatetime  datetime  ,  
age  int(11)   
)  
DEFAULT CHARACTER SET=utf8 COLLATE=utf8_general_ci  
AUTO_INCREMENT=1;

 delimiter $$
SET AUTOCOMMIT = 0$$

create  procedure test1()
begin
declare v_cnt decimal (10)  default 0 ;
 dd:loop
              insert  into usertb values
        (null,'用户1','2010-01-01 00:00:00',20),
        (null,'用户2','2010-01-01 00:00:00',20),
        (null,'用户3','2010-01-01 00:00:00',20),
        (null,'用户4','2010-01-01 00:00:00',20),
        (null,'用户5','2011-01-01 00:00:00',20),
        (null,'用户6','2011-01-01 00:00:00',20),
        (null,'用户7','2011-01-01 00:00:00',20),
        (null,'用户8','2012-01-01 00:00:00',20),
        (null,'用户9','2012-01-01 00:00:00',20),
        (null,'用户0','2012-01-01 00:00:00',20)
            ;
                commit;
                   set v_cnt = v_cnt+10 ;
                             if v_cnt = 10000000 then leave dd;
                             end if;
                end loop dd ;
end;$$
delimiter ;
call test1;