将select语句传递给Oracle PLSQL
我有一个接受阵列的PLSQL oracle函数:将select语句传递给Oracle PLSQL,oracle,plsql,Oracle,Plsql,我有一个接受阵列的PLSQL oracle函数: CREATE OR REPLACE FUNCTION CM.give_me_an_arrays (p_array IN num_array) RETURN VARCHAR2 IS x VARCHAR2 (512); BEGIN x := ''; FOR i IN 1 .. p_array.COUNT LOOP DBMS_OUTPUT.put_line (p_array (i)); END LOOP;
CREATE OR REPLACE FUNCTION CM.give_me_an_arrays (p_array IN num_array)
RETURN VARCHAR2
IS
x VARCHAR2 (512);
BEGIN
x := '';
FOR i IN 1 .. p_array.COUNT
LOOP
DBMS_OUTPUT.put_line (p_array (i));
END LOOP;
RETURN x;
END;
/
我想这样做:
select CM.give_me_an_arrays(select COM.COM_ID
from CM.XLP_SE_COMPONENT com
where rownum < 10)
from dual
有什么想法吗?
提前感谢。只要阵列是在11gR2上测试的sql对象,您就可以这样做,它应该在10g上工作:
SQL> create or replace type num_array is table of number;
2 /
Type created.
SQL> CREATE OR REPLACE FUNCTION give_me_an_arrays (p_array IN num_array)
2 RETURN VARCHAR2
3 IS
4 x VARCHAR2 (512);
5 BEGIN
6 x := '';
7 FOR i IN 1 .. p_array.COUNT
8 LOOP
9 DBMS_OUTPUT.put_line (p_array (i));
10 END LOOP;
11
12 RETURN x;
13 END;
14 /
Function created.
您可以使用聚合函数调用此函数:
SQL> SELECT give_me_an_arrays((SELECT cast(collect(rownum) AS num_array) value
2 FROM dual
3 CONNECT BY level <= 10)) arr
4 FROM dual;
ARR
--------------------------------------------------------------------------------
1
2
[..]
10
在9i甚至8i中,现在无法测试,COLLECT不存在,但您可以使用:
函数需要接受数组是否有原因?它可以接受游标吗?如果您希望传入SELECT语句的结果,那么这通常更有意义。如果要获取返回10行的查询结果并生成单个聚合结果,是否确实不想编写自定义聚合函数?
SQL> SELECT give_me_an_arrays(cast(MULTISET(SELECT rownum value
2 FROM dual
3 CONNECT BY level <= 10) AS num_array)
4 ) arr
5 FROM dual;
ARR
--------------------------------------------------------------------------------
1
2
[..]
10