Oracle中函数/过程返回结果集的

Oracle中函数/过程返回结果集的几种方式:
    以函数return为例,存储过程只需改为out参数即可,在oracle 10g测试通过.
    (1) 返回游标:
        return的类型为:SYS_REFCURSOR
        之后在IS里面定义变量:curr SYS_REFCURSOR;
        最后在函数体中写:
        open cur for
            select ......;
        return cur;
        例:
       

CREATEORREPLACEFUNCTION A_Test(
                 orType varchar2
         )RETURN SYS_REFCURSOR
        is
                type_cur SYS_REFCURSOR;
        BEGIN
            OPEN type_cur FOR
                    select col1,col2,col3 from testTable ;
                  RETURN   type_cur;
        END;

    (2)返回table类型的结果集:
        首先定义一个行类型:
           

CREATEORREPLACE TYPE "SPLIT_ARR"  AS OBJECT(nowStr varchar2(18))

        其次以此行类型定义一个表类型:
       

  CREATEORREPLACE TYPE "SPLIT_TAB" ASTABLEof split_arr;

        定义函数(此函数完成字符串拆分功能):
           

CREATEORREPLACEFUNCTION GetSubStr(
                   strinvarchar2, --待分割的字符串
                    splitchar invarchar2--分割标志
             )
            return split_tab
            IS
               restStr varchar2(2000) default GetSubStr.str;--剩余的字符串
               thisStr varchar2(18);--取得的当前字符串
               indexStr int;--临时存放分隔符在字符串中的位置
             
               v split_tab := split_tab(); --返回结果

            begin
                  dbms_output.put_line(restStr);
                 while length(restStr) !=0
                    LOOP
                     <<top>>
                      indexStr := instr(restStr,splitchar); --从子串中取分隔符的第一个位置

                     if indexStr =0and length(restStr) !=0  then--在剩余的串中找不到分隔符
                        begin
                           v.extend;
                           v(v.count) := split_arr(Reststr);
                          return v;
                        end;
                     endif;
                    
                     if indexStr =1then---第一个字符便为分隔符,此时去掉分隔符
                        begin
                              restStr := substr(restStr,2);
                             goto   top;
                        end;
                     endif;
                    
                     if length(restStr) =0or restStr isnullthen
                        return v;
                     endif;
                   
                      v.extend;
                      thisStr := substr(restStr,1,indexStr -1); --取得当前的字符串
                      restStr := substr(restStr,indexStr +1);---取剩余的字符串

                      v(v.count) := split_arr(thisStr);
                   END LOOP;
                 return v;
            end;

        在PL/SQL developer中可以直接调用
          

cursor strcur is
                         select nowStr fromTable(GetSubStr('111,222,333,,,',','));

    (3)以管道形式输出:
       

create type row_type as object(a varchar2(10), v varchar2(10));--定义行对象
        create type table_type astableof row_type; --定义表对象
        createorreplacefunction test_fun(
             a invarchar2,b invarchar2
         )
        return table_type pipelined
        is
             v row_type;--定义v为行对象类型
        begin
          for thisrow in (select a, b from mytable where col1=a and col2 = b) loop
             v := row_type(thisrow.a, thisrow.b);
            pipe row (v);
          end loop;
          return;
        end;
        select*fromtable(test_fun('123','456'));

这里面我有疑问，返回游标的话那怎么调用里面的值呢，大家帮我想想，不会用哦