ORACLE高效分页存储过程代码

ORACLE高效分页存储过程代码
create or replace package p_page is
-- Author : PHARAOHS
-- Created : 2006-4-30 14:14:14
-- Purpose : 分页过程
TYPE type_cur IS REF CURSOR; --定义游标变量用于返回记录集

PROCEDURE Pagination(
Pindex in number, --分页索引
Psql in varchar2, --产生dataset的sql语句
Psize in number, --页面大小
Pcount out number, --返回分页总数
v_cur out type_cur --返回当前页数据记录
);

procedure PageRecordsCount(
Psqlcount in varchar2, --产生dataset的sql语句
Prcount out number --返回记录总数
);

end p_page;
/
create or replace package body p_page is

PROCEDURE Pagination(
Pindex in number,
Psql in varchar2,
Psize in number,
Pcount out number,
v_cur out type_cur
)
AS

v_sql VARCHAR2(1000);
v_count number;
v_Plow number;
v_Phei number;
Begin
------------------------------------------------------------取分页总数
v_sql := 'select count(*) from (' || Psql || ')';
execute immediate v_sql into v_count;
Pcount := ceil(v_count/Psize);
------------------------------------------------------------显示任意页内容
v_Phei := Pindex * Psize + Psize;
v_Plow := v_Phei - Psize + 1;
--Psql := 'select rownum rn,t.* from zzda t' ; --要求必须包含rownum字段
v_sql := 'select * from (' || Psql || ') where rn between ' || v_Plow || ' and ' || v_Phei ;

open v_cur for v_sql;

End Pagination;

--**************************************************************************************

procedure PageRecordsCount(
Psqlcount in varchar2,
Prcount out number
)
as

v_sql varchar2(1000);
v_prcount number;

begin

v_sql := 'select count(*) from (' || Psqlcount || ')';
execute immediate v_sql into v_prcount;
Prcount := v_prcount; --返回记录总数

end PageRecordsCount;

--**************************************************************************************
end p_page;
/