将参数传递给函数时在oracle中返回null?

时间:2019-02-15 12:31:27

标签: database oracle stored-procedures stored-functions

这是我的职责

---Write procedure for retrive data----
CREATE OR REPLACE FUNCTION retrieve_decrypt(
    custid  in NUMBER
)
RETURN sys_refcursor
IS
    decrypt_value sys_refcursor;
BEGIN
     open decrypt_value for Select custname,contactno, enc_dec.decrypt(creditcardno,password) as  
       creditcardno ,enc_dec.decrypt(income,password) as 
            income  from employees where custid=custid ;
    RETURN decrypt_value;
END;
/

我这样称呼它:SELECT retrieve_decrypt(5) FROM DUAL;然后它只返回{}。

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但是我是由custid=5插入的硬编码custid=custid。它将正确返回结果。需要一些专家帮助来解决此问题。

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1 个答案:

答案 0 :(得分:1)

不要将参数命名为列;如果列名是custid,则将参数设为par_custid。否则,将导致问题(如您所见)。

在您的示例中:

CREATE OR REPLACE FUNCTION retrieve_decrypt (par_custid IN NUMBER)
   RETURN SYS_REFCURSOR
IS
   decrypt_value  SYS_REFCURSOR;
BEGIN
   OPEN decrypt_value FOR
      SELECT custname,
             contactno,
             enc_dec.decrypt (creditcardno, password) AS creditcardno,
             enc_dec.decrypt (income, password) AS income
        FROM employees
       WHERE custid = par_custid;

   RETURN decrypt_value;
END;
/