CREATE TABLE `t_user` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`c_user_id` varchar(36) NOT NULL DEFAULT ,
`c_name` varchar(22) NOT NULL DEFAULT ,
`c_province_id` int(11) NOT NULL,
`c_city_id` int(11) NOT NULL,
`create_time` datetime NOT NULL,
PRIMARY KEY (`id`),
KEY `idx_user_id` (`c_user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
方式1:采用存储过程和内存表
创建内存表
利用 MySQL 内存表插入速度快的特点,我们先利用函数和存储过程在内存表中生成数据,然后再从内存表插入普通表中
CREATE TABLE `t_user_memory` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`c_user_id` varchar(36) NOT NULL DEFAULT ,
`c_name` varchar(22) NOT NULL DEFAULT ,
`c_province_id` int(11) NOT NULL,
`c_city_id` int(11) NOT NULL,
`create_time` datetime NOT NULL,
PRIMARY KEY (`id`),
KEY `idx_user_id` (`c_user_id`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4;
创建函数和存储过程
# 创建随机字元串和随机时间的函数
mysql> delimiter $$
mysql> CREATE DEFINER=`root`@`%` FUNCTION `randStr`(n INT) RETURNS varchar(255) CHARSET utf8mb4
-> DETERMINISTIC
-> BEGIN
-> DECLARE chars_str varchar(100) DEFAULT abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789;
-> DECLARE return_str varchar(255) DEFAULT ;
-> DECLARE i INT DEFAULT 0;
-> WHILE i < n DO
-> SET return_str = concat(return_str, substring(chars_str, FLOOR(1 + RAND() * 62), 1));
-> SET i = i + 1;
-> END WHILE;
-> RETURN return_str;
-> END$$
Query OK, 0 rows affected (0.00 sec)
mysql> CREATE DEFINER=`root`@`%` FUNCTION `randDataTime`(sd DATETIME,ed DATETIME) RETURNS datetime
-> DETERMINISTIC
-> BEGIN
-> DECLARE sub INT DEFAULT 0;
-> DECLARE ret DATETIME;
-> SET sub = ABS(UNIX_TIMESTAMP(ed)-UNIX_TIMESTAMP(sd));
-> SET ret = DATE_ADD(sd,INTERVAL FLOOR(1+RAND()*(sub-1)) SECOND);
-> RETURN ret;
-> END $$
mysql> delimiter ;
# 创建插入数据存储过程
mysql> CREATE DEFINER=`root`@`%` PROCEDURE `add_t_user_memory`(IN n int)
-> BEGIN
-> DECLARE i INT DEFAULT 1;
-> WHILE (i <= n) DO
-> INSERT INTO t_user_memory (c_user_id, c_name, c_province_id,c_city_id, create_time) VALUES (uuid(), randStr(20), FLOOR(RAND() * 1000), FLOOR(RAND() * 100), NOW());
-> SET i = i + 1;
-> END WHILE;
-> END
-> $$
Query OK, 0 rows affected (0.01 sec)
调用存储过程
mysql> CALL add_t_user_memory(1000000);
ERROR 1114 (HY000): The table t_user_memory is full