I have stored procedure which executes another stored procedure several times. I need union and return data, which I have after executing second procedure.
Can I in some way union data from several cursors into one another cursor? It is possible without temporary tables or table-like datatype?
EDIT: Cursor count for union actually is n (where n is 1, 2, 3, etc, detecting by another procedure).
For example:
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;
/
expected output:
---
1
1
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.