CREATE PROCEDURE `autoInsert`()
BEGIN
    DECLARE i int default 10000;
    WHILE(i < 20000000) DO
        insert into user(name) values (concat("user",i));
        SET i = i+1;
    END WHILE;
    END

调用存储过程
call autoInsert()

删除存储过程
DROP PROCEDURE IF EXISTS `autoInsert`