Mysql应用使用mysql触发器高性能创造数据的实例

create table `tb1` (
  `id` varchar(255) not null,
  `log_date` date default null,
  primary key (`id`)
) engine=innodb default charset=utf8 row_format=fixed

create definer = 'root'@'localhost'
procedure db_myisam.sp_generate_tb1_data(in cur_1 int,
                                         in f_input int,
                                         in f_commit_num int
                                         -- stands for which month's date.
)
begin
  declare t_count int;
  declare v_log_date date;
  declare c_date date default '2012-07-01

mysql> call sp_generate_tb1_data(1,10000000,200);
query ok, 0 rows affected (8 min 20.00 sec)

mysql> select count(*) from tb1;
+----------+
| count(*) |
+----------+
| 10000000 |
+----------+
1 row in set (34.35 sec)

create table tb2 like tb1;
create table tb3 like tb1;

create
    definer = 'root'@'localhost'
trigger db_myisam.ti_tb3_after
    after insert
    on db_myisam.tb3
    for each row
begin
  declare v_cur_1 int default 1;
  declare v_log_date date;
  declare c_date date default '2012-07-01';MYSQL教程

  while v_cur_1 <= 10000000
  do
    set v_log_date = date_add(c_date, interval ceil(rand() * 3) * (ceil(rand() * 15)) day);
    insert into tb2 (id, log_date) values (v_cur_1, v_log_date);
    set v_cur_1 = v_cur_1 + 1;
  end while;
endMYSQL教程

mysql> insert into tb3 values (2,current_date());
query ok, 1 row affected (5 min 14.07 sec)