mysql存储过程，生成测试数据

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指定要插入数据的表，如 tb_info表
创建内存表,可以增加插入效率>create tb_info_memory(..);

DELIMITER // -- 修改MySQL delimiter：'//'
DROP PROCEDURE IF EXISTS `add_data` //
CREATE PROCEDURE `add_data`(IN n INT)
BEGIN
    DECLARE i INT DEFAULT 1;
    WHILE i < n DO
        -- 这里想内存表插入数据
        -- 如：INSERT INTO `tb_info_memory`(`book_id`,..)values(...);

        SET i = i + 1;
    END WHILE;
END 
DELIMITER ;  -- 改回默认的 MySQL delimiter：';'

调用存储过程call add_data(1000)；这里生成1000条数据
将数据表插入实际表中

INSERT INTO `tb_info`
(`book_id`,
    ..
)
select * from tb_info_memory;

DELIMITER //
drop procedure if exists add_data //
create procedure add_data(in n int ,out s longtext)
begin
    declare i int(6) default 1;
    declare v_sql longtext;
    set v_sql = concat('INSERT INTO `bookdb`.`t`(`id`,`name`)VALUES(',floor(rand()*100),',','''',rand_string(5),'''',')');
    while i<n DO 
        set v_sql = concat(v_sql,',(',floor(rand()*100),',','''',rand_string(5),'''',')');
        set i=i+1;
    END while;
    set @s_sql = concat(v_sql);
    set s = @s_sql;
    prepare stmt from @s_sql;
    execute stmt;
    deallocate prepare stmt;
end
DELIMITER ;

--插入并显示sql
call add_data(30000,@sql_str);
select @sql_str;