MySQL快速生成100W条测试数据

https://blog.csdn.net/qq_16946803/article/details/81870174

1、生成思路
利用mysql内存表插入速度快的特点，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

2、创建普通表及内存表
普通表
CREATE TABLE `vote_record` (
`id` INT (11) NOT NULL AUTO_INCREMENT,
`user_id` VARCHAR (20) NOT NULL,
`vote_id` INT (11) NOT NULL,
`group_id` INT (11) NOT NULL,
`create_time` datetime NOT NULL,
PRIMARY KEY (`id`),
KEY `index_user_id` (`user_id`) USING HASH
) ENGINE = INNODB AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8

内存表
CREATE TABLE `vote_record_memory` (
`id` INT (11) NOT NULL AUTO_INCREMENT,
`user_id` VARCHAR (20) NOT NULL,
`vote_id` INT (11) NOT NULL,
`group_id` INT (11) NOT NULL,
`create_time` datetime NOT NULL,
PRIMARY KEY (`id`),
KEY `index_id` (`user_id`) USING HASH
) ENGINE = MEMORY AUTO_INCREMENT = 1 DEFAULT CHARSET = utf8

3、创建函数及存储过程
CREATE FUNCTION `rand_string`(n INT) RETURNS varchar(255) CHARSET latin1
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
CREATE PROCEDURE `add_vote_memory`(IN n int)
BEGIN
DECLARE i INT DEFAULT 1;
WHILE (i <= n ) DO
INSERT into vote_record_memory (user_id,vote_id,group_id,create_time ) VALUEs (rand_string(20),FLOOR(RAND() * 1000),FLOOR(RAND() * 100) ,now() );
set i=i+1;
END WHILE;
END

4、调用存储过程（生成内存表数据）
CALL add_vote_memory(1000000)

如果内存不足，wind8.1中添加一下两段代码，在mysql的服务器配置文件中my.ini

tmp_table_size=1G
max_heap_table_size = 1G

5、插入普通表中
INSERT into vote_record SELECT * from vote_record_memory