mysql分页存储过程

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
 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) 这个字段最好是主键*/
 prepare stmtsqlcount from @strsqlcount;
 execute stmtsqlcount;
 deallocate prepare stmtsqlcount;
END