Oracle分页存储过程

--创建包规范
create or replace package package_page as
  type cursor_page is ref cursor;
  Procedure proc_page(
             p_curpage Number,                     --当前页
             p_pagesize Number,                   --每页大小
             p_tablename varchar2,                --表名emp e
             p_where varchar2,                       --查询条件e.ename like '%S%'
             p_tablecolumn varchar2,             --查询列e.id,e.ename,e.job
             p_order varchar2,                         --排序e.ename desc
             p_rowcount out Number,             --总条数,输出参数
             p_pagecount out number,            --总页数
             p_cursor out cursor_page);        --结果集
end package_page;

--创建包主休
Create Or Replace Package Body package_page
Is
       --存储过程
      Procedure proc_page(

　　　　p_curpage Number,                     --当前页
             p_pagesize Number,                   --每页大小
             p_tablename varchar2,                --表名emp e
             p_where varchar2,                       --查询条件e.ename like '%S%'
             p_tablecolumn varchar2,             --查询列e.id,e.ename,e.job
             p_order varchar2,                         --排序e.ename desc
             p_rowcount out Number,             --总条数,输出参数
             p_pagecount out number,            --总页数
             p_cursor out cursor_page　　　　--结果集
      )
      is
            v_count_sql varchar2(2000);
            v_select_sql varchar2(2000);
      begin
            --查询总条数
            v_count_sql:='select count(*) from '||p_tablename;
            --连接查询条件(''也属于is null)
            if p_where is not null  then
               v_count_sql:=v_count_sql||' where '||p_where;
            end if;
            --执行查询,查询总条数
            execute immediate v_count_sql into p_rowcount;
           
            --dbms_output.put_line('查询总条数SQL=>'||v_count_sql);
            --dbms_output.put_line('查询总条数Count='||p_rowcount);
           
             --得到总页数
             if mod(p_rowcount,p_pagesize)=0 then
                p_pagecount:=p_rowcount/p_pagesize;
             else
                p_pagecount:=p_rowcount/p_pagesize+1;
             end if;
           
            --如果查询记录大于0则查询结果集
            if p_rowcount>0 and p_curpage>=1 and p_curpage<=p_pagecount then
              
               --查询所有(只有一页)
               if p_rowcount<=p_pagesize then
                  v_select_sql:='select '||p_tablecolumn||' from '||p_tablename;
                  if p_where is not null then
                     v_select_sql:=v_select_sql||' where '||p_where;
                  end if;
                  if p_order is not null then
                      v_select_sql:=v_select_sql||' order by '||p_order;
                  end if;
               elsif p_curpage=1 then  --查询第一页
                  v_select_sql:='select '||p_tablecolumn||' from '||p_tablename;
                  if p_where is not null then
                     v_select_sql:=v_select_sql||' where '||p_where||' and rownum<='||p_pagesize;
                  else
                     v_select_sql:=v_select_sql||' where rownum<='||p_pagesize;
                  end if;
                  if p_order is not null then
                      v_select_sql:=v_select_sql||' order by '||p_order;
                  end if;
               else      --查询指定页
                  v_select_sql:='select * from (select '|| p_tablecolumn ||',rownum row_num from '|| p_tablename;
                  if p_where is not null then
                     v_select_sql:=v_select_sql||' where '||p_where;
                  end if;
                  if p_order is not null then
                      v_select_sql:=v_select_sql||' order by '||p_order;
                  end if;
                  v_select_sql:=v_select_sql||') where row_num>'||((p_curpage-1)*p_pagesize)||' and row_num<='||(p_curpage*p_pagesize);
               end if;
               --执行查询
               dbms_output.put_line('查询语句=>'||v_select_sql);
               open p_cursor for v_select_sql;
            end if;
           
      end proc_page;
end package_page;

----------------测试----------------
declare
       v_rowcount number(5,0);
       v_pagecount number;
       v_cursor package_page.cursor_page;
begin 
       package_page.proc_page(2,2,'emp e','ename like ''%S%''','e.*','ename desc',v_rowcount,v_pagecount,v_cursor);
       dbms_output.put_line(v_rowcount);
       dbms_output.put_line(v_pagecount);

 

 

 

 

 

--freedom修改后--

 

 

--创建包规范
create or replace package package_page as
  type cursor_page is ref cursor;
  Procedure proc_page(
             p_select_sql varchar2,           --查询语句
             p_count_sql varchar2,            --查询总记录数语句
             p_rowcount out Number,           --总行数
             cursor_page out package_page.cursor_page);       --结果集
end package_page;

--创建包主休

CREATE OR REPLACE Package Body package_page Is
  --存储过程
  Procedure proc_page(p_select_sql varchar2,
                      p_count_sql  varchar2,
                      p_rowcount   out Number,
                      cursor_page  out package_page.cursor_page) is

  begin
    --查询总条数
    --执行查询,查询总条数
    execute immediate p_count_sql
      into p_rowcount;

    --如果查询记录大于0则查询结果集
    if p_rowcount > 0 then
      --执行查询
      open cursor_page for p_select_sql;
    else
      open cursor_page for select * from dual;
    end if;
  end proc_page;
end package_page;