日期:2014-05-16 浏览次数:20736 次
create or replace procedure P_QuerySplit(
  sqlscript varchar2, --表名/SQL语句
  pageSize integer, --每页记录数
  pageIndex integer, --当前页
  totalCount out number, --总记录数
  totalPage out number, --总页数
  v_cur out sys_refcursor --返回游标
  ) is
  /**
  * 
  *
  */
  v_PageSize number;
  v_PageIndex number;
  v_SQL_Count varchar2(4000);
  v_SQL varchar2(4000);
  v_StartIndex number;
  v_EndIndex number;
  begin
  v_PageSize:=pageSize;
  if v_PageSize=0 then
  v_PageSize:=1;
  end if;
  --统计记录数量
  v_SQL_Count := 'select count(*) from (' ? ? sqlscript ? ?') a ';
  execute immediate v_SQL_Count into totalCount;
  --计算总页数
  totalPage:=CEIL(totalCount/v_PageSize);
 --验证页号 如果页号大余了最大页数,返回最后一页
  v_PageIndex:=pageIndex;
  if v_PageIndex>totalPage then
  v_PageIndex:=totalPage;
  end if;
  --计算开始的Index和结束的Index
  v_StartIndex:=(v_PageIndex-1)*v_PageSize 1;
  v_EndIndex:=v_PageIndex*v_PageSize;
  v_SQL:='SELECT /* FIRST_ROWS */* FROM (';
  v_SQL:=v_SQL ? ?' SELECT A.*, ROWNUM RN ';
  v_SQL:=v_SQL ? ?' FROM (' ? ?sqlscript ? ?') A ';
  v_SQL:=v_SQL ? ?' WHERE ROWNUM <= ' ? ?v_EndIndex;
  v_SQL:=v_SQL ? ?')WHERE RN >= ' ? ?v_StartIndex;
  open v_cur for v_SQL;
  end P_QuerySplit;
  带排序的分页存储过程
  CREATE OR REPLACE PROCEDURE TABLEPAGE_SELECT(v_page_size  int, --the size of a page of list
  v_current_page int, --the current page of list
  v_table_name varchar2, --the talbe name
  v_order_field varchar2,--the order field
  v_order_sequence varchar2,--the order sequence should by "_desc"or "_asc",_is blank.
  --v_sql_select  varchar2, --the select sql for procedure
  --v_sql_count  varchar2, --the count sql for procedure
  --v_out_recordcount OUT int, --the num of return rows
  p_cursor OUT refcursor_pkg.return_cursor) as
  v_sql     varchar2(3000); --the sql for select all rows of list
  v_sql_count  varchar2(3000); --the count sql for procedure
  v_sql_order  varchar2(2000); --the order of list
  v_count    int; -- the amount rows fo original list
  v_endrownum  int; --the end row num of the current page
  v_startrownum int; --the start row num of the current page
  BEGIN
  ----set the order of list
  if v_order_field!='NO' then
  v_sql_order :=' ORDER BY '|| v_order_field ||' '||v_order_sequence;
  else
  v_sql_order :='';
  end if;
  ----catch the amount rows of list
  v_sql_count:='SELECT COUNT(ROWNUM) FROM '||v_table_name;
  execute immediate v_sql_count into v_count;
  -- v_out_recordcount := v_count;
  ----set the value of start and end row
  if v_order_sequence='desc' then
  v_endrownum:=v_count-(v_current_page-1)*v_page_size;
  v_startrownum:=v_endrownum - v_page_size + 1;
  else
  v_endrownum:= v_current_page * v_page_size;
  v_startrownum := v_endrownum - v_page_size + 1;
  end if;
  ----the sql for page slide
  v_sql := 'SELECT * FROM (SELECT '||v_table_name||'.*, rownum rn FROM '||v_table_name||' WHERE rownum <= ' ||
  to_char(v_endrownum) ||' '|| v_sql_order||') WHERE rn >= ' ||
  to_char(v_startrownum)||' '||v_sql_order;
  open p_cursor for v_sql;
  END TABLEPAGE_SELECT;