MYSQL分页存储过程及事务处理--转自peace

MYSQL的分页过程，和事务处理的一个测试过程。

/*
--名称：MYSQL版查询分页存储过程 by peace 2013-8-14
--输入参数：@fields        -- 要查询的字段用逗号隔开
--输入参数：@tables        -- 要查询的表
--输入参数：@where        -- 查询条件
--输入参数：@orderby    -- 排序字段
--输出参数：@page        -- 当前页计数从1开始
--输出参数：@pagesize    -- 每页大小
--输出参数：@totalcount -- 总记录数
--输出参数：@pagecount  -- 总页数 
*/
DROP PROCEDURE IF EXISTS Query_Pagination; 
CREATE PROCEDURE Query_Pagination
(
    in _fields varchar(2000),   
    in _tables text, 
    in _where varchar(2000),  
    in _orderby varchar(200),
    in _pageindex int,
    in _pagesize int,
    in _sumfields  varchar(200),/*增加统计字段2013-5-8 peaceli*/
    out _totalcount int ,
    out _pagecount int 
)
begin
   set @startRow = _pageSize*(_pageIndex -1);
   set @pageSize = _pageSize;  set @rowindex = 0;
     set @strsql = CONCAT('select sql_calc_found_rows @rowindex:=@rowindex+1 as rownumber,',_fields,' from ',_tables,case ifnull(_where,'') when '' then '' else concat(' where ',_where) end,' order by ',_orderby,' limit ',@startRow,',',@pageSize);
     prepare strsql from @strsql;
     execute strsql;
   deallocate prepare strsql;
   set _totalcount = found_rows(); 

   if (_totalcount <= _pageSize) then

                    set _pagecount = 1;
                    else if (_totalcount % _pageSize > 0) then
                    set _pagecount = _totalcount / _pageSize + 1;
                    else
                     set _pagecount = _totalcount / _pageSize;
            end if;
        end if;

if(ifnull(_sumfields,'') <> '') then set @sumsql = contact('select ',_sumfields,' from ',_tables,case ifnull(_where,'') when '' then '' else concat(' where ',_where) end); prepare sumsql from @sumsql; execute sumsql; deallocate prepare sumsql; end if; end

CREATE PROCEDURE TransTest(in p1 VARCHAR(20),in p2 VARCHAR(50))
BEGIN
declare err int default 0;  
 /*如果出现sql异常，则将err设置为1后继续执行后面的操作 */  
declare continue handler for sqlexception set err=1; -- 出错处理  
set autocommit = 0;
insert into sy_queryconfig(syq_id) values(p1); 
insert into sy_queryconfig(syq_id) values(p2); 
if err=1 then  
 ROLLBACK;
ELSE
 COMMIT;
end if;
END

CREATE PROCEDURE TransTest2(in p1 VARCHAR(20),in p2 VARCHAR(50))
BEGIN
/*只要发生异常就回滚*/ 
declare exit handler for sqlexception 
BEGIN
    ROLLBACK;
  /*返回异常处理结果等其它操作*/  
END; 
START TRANSACTION;
insert into sy_queryconfig(syq_id) values(p1); 
insert into sy_queryconfig(syq_id) values(p2); 
COMMIT;
END