mysql如何快速生成百万条测试数据

想要在mysql中快速生成百万条测试数据如果使用SQL批量插入显然工作量会很大，可以利用内存表插入数据快的特点，再调用存储过程往内存表插入数据，从内存表中查询数据插入到普通表的思路来解决问题。

1.创建内存表

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

2.创建测试表

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

3.创建函数和存储过程 3.1创建函数

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

3.2创建存储过程

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)

5.插入普通表中

INSERT into vote_record SELECT * from  vote_record_memory

6.查询结果

SELECT COUNT(1) FROM vote_record

7、评论区反馈函数使用错误。

> 1418 - This function has none of DETERMINISTIC, NO SQL, or READS SQL DATA in its declaration and binary logging is enabled (you *might* want to use the less safe log_bin_trust_function_creators variable)