PL/SQL函数是否存在？

我正在尝试创建一个名为add_extra的函数。PL/SQL函数是否存在？

CREATE OR REPLACE FUNCTION add_extra(p_price NUMBER) 
RETURN NUMBER 
IS 
BEGIN 
    RETURN(9000); 
END add_extra;

然而，当我运行该脚本，它说：

Error starting at line 1 in command: 
CREATE OR REPLACE FUNCTION add_extra(p_price NUMBER) 
RETURN NUMBER 
IS 
BEGIN 
    RETURN(9000); 
END add_extra; 
Error report: 
ORA-00955: name is already used by an existing object 
00955. 00000 - "name is already used by an existing object" 
*Cause:  
*Action:

，当我尝试：DROP FUNCTION add_extra;它告诉我：

Error starting at line 1 in command: 
DROP FUNCTION add_extra 
Error report: 
SQL Error: ORA-04043: object ADD_EXTRA does not exist 
04043. 00000 - "object %s does not exist" 
*Cause: An object name was specified that was not recognized by the system. 
       There are several possible causes: 
      - An invalid name for a table, view, sequence, procedure, function, 
      package, or package body was entered. Since the system could not 
      recognize the invalid name, it responded with the message that the 
      named object does not exist. 
      - An attempt was made to rename an index or a cluster, or some 
      other object that cannot be renamed. 
*Action: Check the spelling of the named object and rerun the code. (Valid 
      names of tables, views, functions, etc. can be listed by querying 
      the data dictionary.)

是否存在或是否不存在？我究竟做错了什么？

来源

2011-03-22 whirlwin

难道是功能存在，但你没有权利看到它？您是否试图在您登录的模式中创建函数，或者您是否使用“alter session set current_schema ...”来针对不同的模式工作？您是否试图明确指定模式（CREATE OR REPLACE FUNCTION MYUSER.ADD_EXTRA ...）？ – Codo 2011-03-22 10:37:13

我不确定，但我想它是在我登录的模式中，因为所有其他函数，过程等都出现在对象列表中。另外，当我使用username.add_extra时，我得到相同的错误。 – whirlwin 2011-03-22 10:46:46

此查询可能有助于确定您的对象位于哪个模式（“OWNER”）中：SELECT * FROM ALL_OBJECTS WHERE OBJECT_NAME ='ADD_EXTRA'' – 2011-03-22 11:00:05

我几乎可以肯定这是一个FUNCTION，但它是一个PROCEDURE！因此，DROP PROCEDURE ADD_EXTRA;工作。

来源

2011-03-22 11:21:01 whirlwin

描述add_extra;会告诉你你在为一个给定的对象处理什么。 – tbone 2011-03-22 14:49:21

CREATE OR REPLACE FUNCTION add_extra(p_price IN NUMBER)

__IN__关键字在您的查询中丢失。

来源

2011-11-14 15:10:04

PL/SQL函数是否存在？

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