将游标中的数据合并为一个 [英] Union data from cursors into one

问题描述

我有一个存储过程，它多次执行另一个存储过程.我需要联合并返回执行第二个步骤后所拥有的数据.

I have stored procedure which executes another stored procedure several times. I need union and return data, which I have after executing second procedure.

我可以某种方式将多个游标中的数据合并到另一个游标中吗?是否可以没有临时表或类似表的数据类型?

Can I in some way union data from several cursors into one another cursor? It is possible without temporary tables or table-like datatype?

并集的游标数实际上是n(其中n是1、2、3等，由另​​一个过程检测).

Cursor count for union actually is n (where n is 1, 2, 3, etc, detecting by another procedure).

例如:

CREATE OR REPLACE PROCEDURE proc_data
( data_out OUT SYS_REFCURSOR
) IS
BEGIN
 OPEN data_out FOR SELECT '1' NUM FROM dual;
END;
/

CREATE OR REPLACE PROCEDURE proc_result
( data_out OUT SYS_REFCURSOR
) IS
 data1 SYS_REFCURSOR;
 data2 SYS_REFCURSOR;
BEGIN
 PROC_DATA(data1);
 PROC_DATA(data2);
 -- select data1 and data2 into data_out - how?
END;
/

SET SERVEROUTPUT ON

DECLARE 
 data_out SYS_REFCURSOR;
 temp_row VARCHAR2(10);
BEGIN
 PROC_RESULT(data_out);
  LOOP
    FETCH data_out INTO temp_row;
    EXIT WHEN data_out%NOTFOUND;
    DBMS_OUTPUT.PUT_LINE(temp_row);
  END LOOP;
  CLOSE data_out;
END;
/

预期输出:

---
1   
1   

推荐答案

否，这是不可能的.有很好的讨论在AskTom关于此问题，请看一下提供的可以帮助您的一些变通方法.

No, it's not possible. There's a nice discussion at AskTom regarding this question, take a look maybe some workarounds provided there can help you.

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