如何从PLSQL中的函数返回一组数字,然后在FOR LOOP中使用它? [英] How to return a set of NUMBERS from a Function in PLSQL and then use it in a FOR LOOP?
本文介绍了如何从PLSQL中的函数返回一组数字,然后在FOR LOOP中使用它?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我想在PLSQL中有一个函数,该函数将返回一组数字,然后有一个for循环,该循环将遍历该数据集并对其进行处理.
I wanted to have a function in PLSQL that would return an set of numbers, and then have a for loop that would iterate over that dataset and do something with it.
有什么建议吗?该函数是否需要成为管道函数才能在for循环中使用?即使我只是返回数字,我还需要创建一个新类型吗?
Any suggestions ? Does the function need to be a pipeline function for it to be used in the for loop? Do I need to create a new type even though Im just returning numbers?
谢谢!
CREATE OR REPLACE PACKAGE BODY someBody AS
FUNCTION getListOfNumbers RETURN someList IS -- what type do I return ??
BEGIN
RETURN SELECT SID FROM V$SESSION; -- Not sure what do here ??
END;
PROCEDURE soSomeStuff IS
BEGIN
FOR rec IN(getListOfNumbers) -- how do I select from the function?
LOOP
dbms_output.put_line(rec);
END LOOP;
END;
END;
推荐答案
您需要声明然后您将使用如下定义的类型:
You would then use the defined type like this:
SQL> CREATE OR REPLACE PACKAGE BODY my_package AS
2
3 FUNCTION getListOfNumbers RETURN someList IS
4 l_list someList;
5 BEGIN
6 SELECT SID BULK COLLECT INTO l_list FROM V$SESSION;
7 RETURN l_list;
8 END;
9
10 PROCEDURE soSomeStuff IS
11 l_list someList;
12 BEGIN
13 l_list := getListOfNumbers;
14 FOR i IN 1..l_list.count LOOP
15 dbms_output.put_line(l_list(i));
16 END LOOP;
17 END;
18
19 END my_package;
20 /
Package body created
SQL> exec my_package.soSomeStuff;
284
285
287
288
[...]
PL/SQL procedure successfully completed
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