從函數PLSQL調用過程

Question

我有一個從選擇查詢調用的函數，下面是完美的函數。我想打電話給下面的步驟，如果布爾= 1是將值插入登錄表：

create or replace FUNCTION isLoggedIn(x IN VARCHAR2, y IN VARCHAR2) 
RETURN number IS 
boolean number(1) := 0; 
BEGIN 
SELECT count(*) into boolean 
FROM VIEWLOGIN 
WHERE username = x AND password = y; 

IF boolean = 1 THEN 
    PROCDURELOGIN 
    RETURN boolean;  
ELSE 
    RETURN 0; 
END IF; 
END; 

這是我的程序：

create or replace PROCEDURE PROCDURELOGIN 
IS 
BEGIN 
    INSERT INTO "SW3"."LOGIN" (LOGINID, MEMBERID) 
    VALUES (seqLogin.NEXTVAL, '1'); 
    Commit; 
END; 

Create view VIEWLOGIN 
SELECT firstname, surname, username, password 
FROM member 

但我得到的錯誤，當我運行查詢：

Error starting at line : 1 in command - 
SELECT firstname, surname, isLoggedIn(username, password) 
FROM VIEWLOGIN 
WHERE username = 'fionawalshe' AND password = 'qwertyu8' 
Error report - 
SQL Error: ORA-14551: cannot perform a DML operation inside a query 
ORA-06512: at "SW3.PROCDURELOGIN", line 4 
ORA-06512: at "SW3.ISLOGGEDIN", line 10 
14551. 00000 - "cannot perform a DML operation inside a query " 
*Cause: DML operation like insert, update, delete or select-for-update 
      cannot be performed inside a query or under a PDML slave. 
*Action: Ensure that the offending DML operation is not performed or 
      use an autonomous transaction to perform the DML operation within 
      the query or PDML slave. 

Answer 1

Oracle在錯誤信息中明確表示，什麼是問題。試試這個：

create or replace PROCEDURE PROCDURELOGIN 
IS 
pragma autonomous_transaction; 
BEGIN 
    INSERT INTO "SW3"."LOGIN" (LOGINID, MEMBERID) 
    VALUES (seqLogin.NEXTVAL, '1'); 
    Commit; 
END; 

順便說一下，我不喜歡這樣的程序，並建議不要使用它們，如果可能的話。