调用过程时错误的数量或类型的参数错误 [英] Wrong number or types of arguments error while calling procedure

问题描述

如何在Oracle的另一个过程中调用过程?我正在尝试按以下步骤进行操作，但出现错误"PLS-00306(325:13):PLS-00306:调用的参数数目或参数类型错误TITLE_CRUD'"

How can i call procedure inside another procedure in Oracle?I'm trying as follow but i am getting that error "PLS-00306 (325: 13): PLS-00306: wrong number or types of arguments in call to 'TITLE_CRUD'"

PROCEDURE create_title(
        P_TITLE varchar2,
        P_USER varchar2,
        P_ERR OUT VARCHAR2 
   )
   IS    
   BEGIN  
        IF P_TITLE IS NULL THEN
            P_ERR := 'Null value';
        ELSE
            title_crud('I',NULL,P_TITLE,P_USER);      
        END IF;  
   END;


 PROCEDURE title_crud(
        P_OP_TYPE VARCHAR2,
        P_ID number,
        P_TITLE varchar2,
        P_USER varchar2,
        P_ERR OUT VARCHAR2 
   )...

推荐答案

请参见以下更改，对title_crud的调用没有变量来保存其返回的内容(p_err)

See the change below, the call to title_crud doesn't have a variable to hold what is being returned by it (p_err)

PROCEDURE create_title(
        P_TITLE varchar2,
        P_USER varchar2,
        P_ERR OUT VARCHAR2 
   )
   IS    
   BEGIN  
        IF P_TITLE IS NULL THEN
            P_ERR := 'Null value';
        ELSE
            title_crud('I',NULL,P_TITLE,P_USER,P_ERR); -- Extra Parameter      
        END IF;  
   END;


 PROCEDURE title_crud(
        P_OP_TYPE VARCHAR2,
        P_ID number,
        P_TITLE varchar2,
        P_USER varchar2,
        P_ERR OUT VARCHAR2 
   )...

一个容易犯的错误，但是我发现在调用一个过程时，您更容易避免使用命名符号传递参数.您对title_crud的呼叫将变为

An easy mistake to make but I find easier to avoid when calling a procedure you pass parameters by named notation. Your call to title_crud becomes

...
 title_crud(P_OP_TYPE => 'I',
            P_ID      =>  NULL,
            P_TITLE   =>  P_TITLE,
            P_USER    =>  P_USER,
            P_ERR     =>  P_ERR);
...

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