从函数调用 PLSQL 过程答案

【问题标题】：PLSQL call procedure from function从函数调用 PLSQL 过程
【发布时间】：2014-10-31 22:05:42
【问题描述】：

我有一个从选择查询中调用的函数，下面是完美运行的函数。如果 boolean = 1 将值插入登录表，我想调用以下过程：

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;

这是我的程序：

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

但是当我运行查询时出现错误：

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.

【问题讨论】：

就这样吧。问题是什么？
请编辑您的问题并添加 VIEWLOGIN 视图的来源。谢谢。

标签： stored-procedures plsql stored-functions

【解决方案1】：

Oracle 在错误信息中明确指出，什么是问题。试试这个：

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

顺便说一句，我不喜欢这样的程序，建议尽可能不要使用它们。

【讨论】：

完美排序。