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 procedure P_Pagination
(
Pindex in number, --页号 从1开始
Psql in varchar2, --查询语句
Psize in number, --每页分多少行
Pcount out number, --共有多少页
v_cur out Sys_Refcursor --返回数据集
)
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 ;
v_Plow := v_Phei - Psize + 1;
v_sql := 'select * from (select rownum rn,t.* from (' || Psql || ')t) where rn between ' || v_Plow || ' and ' || v_Phei ;

open v_cur for v_sql;

End P_Pagination;