1、生成思路

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

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

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

CALL add_vote_memory(1000000)

根据电脑性能不能所花时间不一样，大概时间在小时级别，如果报错内存满了，只在修改max_heap_table_size 个参数即可，win7修改位置如下，linux，修改my.cnf文件，修改后要重启mysql，重启后内存表数据会丢失

5、插入普通表中

INSERT into vote_record SELECT * from vote_record_memory

6、结果