第一步：创建管理表序列

CREATE TABLE `sequence` (
  `name` varchar(50) NOT NULL,
  `current_value` int(11) NOT NULL,
  `increment` int(11) NOT NULL DEFAULT '1',
  PRIMARY KEY (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

第二步：创建操作的函数

currval：获取当前序列的数值

CREATE DEFINER=`root`@`%` FUNCTION `currval`(seq_name VARCHAR(50)) RETURNS int
    DETERMINISTIC
BEGIN
DECLARE value INTEGER; 
SET value = 0; 
SELECT current_value INTO value 
FROM sequence
WHERE name = seq_name; 
RETURN value; 
END

nextval 获取下一个序列的数值

CREATE DEFINER=`root`@`%` FUNCTION `nextval`(seq_name VARCHAR(50)) RETURNS int
    DETERMINISTIC
BEGIN
UPDATE sequence
SET current_value = current_value + increment 
WHERE name = seq_name; 
RETURN currval(seq_name); 
END

setval 设置序列的开始数值

CREATE DEFINER=`root`@`%` FUNCTION `setval`(seq_name VARCHAR(50), value INTEGER) RETURNS int
    DETERMINISTIC
BEGIN
UPDATE sequence
SET current_value = value 
WHERE name = seq_name; 
RETURN currval(seq_name); 
END