聲明SYS_REFCURSOR和ROWTYPE在存儲過程

Question

所以我有一個存儲過程ONE

create or replace PROCEDURE ONE 
(
    A in number 
    B in number 
    ... 
    ZZ out SYS_REFCURSOR 
) IS 
    SOME_OTHER_STUFF 
BEGIN 
    ... 
END 

這將返回了一些數據，我需要一個SYS_REFCURSOR。然後，我有一個存儲過程TWO

create or replace PROCEDURE TWO 
(
    A in number 
    B in number 
    ... 
    ZZ out SYS_REFCURSOR 
) IS 
    Count_Records Sys_Refcursor; 
    l_rec Count_Records%rowtype; 
BEGIN 
    /* get some data from the ONE stored procedure to use on this procedure*/ 
    ONE(A,B,...Count_Records) 

    Loop 
     fetch count_records into l_rec; 
     Exit When count_records%Notfound; 
     If l_rec.TT_RAW > MAX_RECORDS Then 
     Raise To_Many_Results; 
     End If; 
    End Loop; 

END 

我得到一個錯誤，當我嘗試申報行類型l_rec Count_Records%rowtype;

我怎樣才能宣佈這個變量？問題是TT_RAW這是我試圖得到的列是一個SUM和遊標沒有映射到任何表，它包括大量的計算。

感謝

Answer 1

可以讀取到的變量列表，而不是，或創建自己的記錄類型：

... 
fetch count_records into v_field1, v_field2, v_field3 
... 

Answer 2

的sys_refcursor整個的一點是，它的動態定義。另一方面，聲明rowtype必須是靜態的（如果不是，編譯器無法判斷從其引用的字段是否有效）。這是一個用例的定義，您應該定義自己的強類型引用遊標，而不是使用sys_refcursor。

下面是一個很簡單的例子：

CREATE OR REPLACE PACKAGE BODY rc_example IS 
    PROCEDURE two (a IN NUMBER, b IN NUMBER); 
END rc_example; 
/

CREATE OR REPLACE PACKAGE BODY rc_example IS 
    TYPE one_record IS RECORD (FIRST_VALUE VARCHAR2 (10)); 

    TYPE one_cursor IS REF CURSOR 
     RETURN one_record; 

    --Could alternately be declared using a table's rowtype: 
    --TYPE one_cursor is ref cursor return some_table%rowtype; 

    PROCEDURE one (a IN NUMBER, b IN NUMBER, zz OUT one_cursor) IS 
    BEGIN 
     OPEN zz FOR SELECT 'test' FROM DUAL; 
    END one; 

    PROCEDURE two (a IN NUMBER, b IN NUMBER) IS 
     count_records SYS_REFCURSOR; 
     l_rec count_records%ROWTYPE; 
    BEGIN 
     one (a, b, count_records); 

     LOOP 
     FETCH count_records INTO l_rec; 

     DBMS_OUTPUT.put_line (l_rec.FIRST_VALUE); 
     EXIT WHEN count_records%NOTFOUND; 
     END LOOP; 
    END two; 
END rc_example; 
/