MySQL海量数据的通用存储过程分页代码

CREATE TABLE IF NOT EXISTS `test` (
  `id` int(11) NOT NULL auto_increment,
  `sort` int(11)
  `title` varchar(50),
  PRIMARY KEY  (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=gb2312 AUTO_INCREMENT=1 ;

DELIMITER $$;
DROP PROCEDURE IF EXISTS `sp_page`$$
CREATE PROCEDURE `sp_page`(
 in _pagecurrent int,/*当前页*/
 in _pagesize int,/*每页的记录数*/
 in _ifelse varchar(1000),/*显示字段*/
 in _where varchar(1000),/*条件*/
 in _order varchar(1000)/*排序*/
)
COMMENT '分页存储过程'
BEGIN --//www.jbxue.com
 if _pagesize<=1 then
  set _pagesize=20;
 end if;
 if _pagecurrent < 1 then
  set _pagecurrent = 1;
 end if;
 
 set @strsql = concat('select ',_ifelse,' from ',_where,' ',_order,' limit ',_pagecurrent*_pagesize-_pagesize,',',_pagesize);
 prepare stmtsql from @strsql;
 execute stmtsql;
 deallocate prepare stmtsql;
 set @strsqlcount=concat('select count(1) as count from ',_where);/*count(1) 此字段最好使用主键*/
 prepare stmtsqlcount from @strsqlcount;
 execute stmtsqlcount;
 deallocate prepare stmtsqlcount;
END$$
DELIMITER ;$$

call sp_Page(1,3,'*','test','order by id desc');

call sp_Page(1,3,'*','test where sort=1','order by id desc');

call sp_Page(1,3,'id,title','test where sort=1','order by id desc');