http://blog.csdn.net/jdzms23/article/details/44228661
首先创建表：
CREATE TABLE `sys_sequence` (
`NAME` varchar(50) NOT NULL,
`CURRENT_VALUE` int(11) NOT NULL DEFAULT '0',
`INCREMENT` int(11) NOT NULL DEFAULT '1',
PRIMARY KEY (`NAME`)
)
插入记录
INSERT INTO SYS_SEQUENCE(NAME,CURRENT_VALUE,INCREMENT) VALUES('TBL_FS', 1,1)
DELIMITER $$
DROP FUNCTION IF EXISTS `currval`$$
CREATE DEFINER=`root`@`%` FUNCTION `currval`(seq_name VARCHAR(50)) RETURNS INT(11)
BEGIN
DECLARE VALUE INTEGER;
SET VALUE=0;
SELECT current_value INTO VALUE
FROM sys_sequence
WHERE NAME=seq_name;
RETURN VALUE;
END$$
DELIMITER ;
查询当前记录：
select currval('TBL_FS');
如果出现Error Code: 1449 The user specified as a definer ('root'@'%') does not exist 错误，则执行如下sql：
grant all privileges on *.* to root@"%" identified by "password";
flush privileges;
继续执行当前记录sql则成功创建nextval函数
DELIMITER $$
DROP FUNCTION IF EXISTS `nextval`$$
CREATE DEFINER=`root`@`%` FUNCTION `nextval`(seq_name varchar(50)) RETURNS int(11)
BEGIN
UPDATE sys_sequence
SET CURRENT_VALUE = CURRENT_VALUE + INCREMENT
where name=seq_name;
return currval(seq_name);
END$$
执行nextval函数
select nextval('tbl_fs')
