CREATE OR REPLACE PROCEDURE pro_query
(
  paraID IN int,
  p_cus OUT TYPES.cursorType --我定义的返回游标，用这个返回给JAVA调用端
)
AS
  vs_lx VARCHAR2(200);

  v_paraname varchar2(100);
  v_paravalue varchar2(100); 
  v_sql varchar2(1000);

  cursor c_getpar(para_id number) is
     select paraname,paravalue from tb_para where paraid = :para_id;
BEGIN
   --根据传入的参数paraID ，去tb_para循环取得参数名和参数值
   v_sql := 'select * from tb_table where 1=1 ';
   open c_getpar(paraID);
   fetch c_getpar into v_paraname,v_paravalue;
   while c_getpar%found loop
     --组合SQL语句，比如传入参数是1，那组合成的语句就是select * from tb_table where name='zhangdan' and age='30'
     v_sql := v_sql || ' ' || v_paraname || ' = ' || v_paravalue;
     fetch c_getpar into v_paraname,v_paravalue;
   end loop;
      --返回游标参数赋值
   OPEN p_cus FOR v_sql; --刚才那个组合成的语句，最后返回的就是这个类型
End;

------解决方案--------------------

SQL code

create or replace procedure GetResultProc(in_paraid in varchar2,
                                  out_ResultSql out varchar2 ) as
  sSql varchar2(2000);
  sSql1 varchar2(2000);
  type v_Curtype is ref cursor;
  v_cur v_Curtype;
--  v_ResultCur v_curtype;
  s_paraname varchar2(20);
  s_paravalue varchar2(20);
  iCount number;
begin
  if in_paraid is null then
    return;
  end if;
  sSql := 'select paraname,paravalue from tb_para where paraid='||in_paraid;
  iCount := 0;
  open v_cur for sSql;
  loop
    fetch v_cur into s_paraname,s_paravalue;
    exit when v_cur%notfound;
    if iCount = 0 then
      sSql1 := 'select * from tb_table where '||s_paraname||'='''||s_paravalue||'''';
    else
      sSql1 := sSql1||' and '||s_paraname||'='''||s_paravalue||'''';
    end if;
    iCount := iCount+1;
  end loop;
  close v_cur;

  if sSql1 is null then
    return;
  end if;
 -- open v_ResultCur fro sSql1;
  out_ResultSql := sSql1;
end;