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;

/