Pager

create or replace package Pager
is
type curs is ref cursor;
procedure Pagination
(
inPageSize in integer, --每頁記錄數
inPageIndex in integer, --當前頁數
inTableName in varchar2, --表名
inOrderField in varchar2,--排序字段
inIsOrderBy in varchar2,--排序類別，輸入' desc' 或者' asc'
inWhere in varchar2,--查詢條件
outRecordCount out int, --總記錄數
outPageCount out int,
outCursor out curs --遊標變量
);
end;
create or replace package body Pager
is
procedure Pagination
(
inPageSize in integer, --每頁記錄數
inPageIndex in integer, --當前頁數
inTableName in varchar2, --表名
inOrderField in varchar2,--排序字段
inIsOrderBy in varchar2,--排序類別，輸入' desc' 或者' asc'
inWhere in varchar2,--查詢條件
outRecordCount out int, --總記錄數
outPageCount out int,
outCursor out curs --遊標變量
)
is
v_sql varchar2(3000); --總的sql 語句
v_sql_count varchar2(3000); --總記錄的sql 語句
v_sql_order varchar2(2000); --排序的sql 語句
v_count int; -- --總記錄數
v_endrownum int; --結束行
v_startrownum int; --開始行
begin
if inOrderField!='NO' then
v_sql_order :=' ORDER BY '|| inOrderField ||' '||inIsOrderBy;
else
v_sql_order :='';
end if;
if inWhere is not null then
v_sql_count:='SELECT COUNT(ROWNUM) FROM '||inTableName||' where '||inWhere;
else
v_sql_count:='SELECT COUNT(ROWNUM) FROM '||inTableName;
end if;
execute immediate v_sql_count into v_count;
outRecordCount := v_count;
if mod(v_count,inPageSize)=0 then
outPageCount:= v_count/inPageSize;
else
outPageCount:= v_count/inPageSize+1;
end if;
v_startrownum:= 1+(inPageIndex-1)*inPageSize;
v_endrownum:= inPageIndex*inPageSize;
if inWhere is not null then
v_sql := 'SELECT * FROM (SELECT '||inTableName||'.*, row_number() over ('||v_sql_order||')
num FROM '||inTableName||' WHERE '|| inWhere||'
) WHERE num between '||to_char(v_startrownum)||' and '||to_char(v_endrownum)||'';
else
v_sql := 'SELECT * FROM (SELECT '||inTableName||'.*, row_number() over ('||v_sql_order||')
num FROM '||inTableName||'
) WHERE num between '||to_char(v_startrownum)||' and '||to_char(v_endrownum)||'';
end if;
open outCursor for v_sql;
end;
end;