mysql 快速生成百万条测试数据

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

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