Referencing other schema table in procedure

Question

Hello All,
I am writing a stored procedure and within this i have an update statement which updates a table in my own schema based on
certain condition based on different schema table.
CREATE OR REPLACE PROCEDURE PROC_UPD(P_TBL_NAME VARCHAR2)
IS
V_TBL_NAME VARCHAR2(20) := P_TBL_NAME;
V_SQL_STMT1 VARCHAR2(9999);
BEGIN
V_SQL_STMT1 :=    'UPDATE '||  V_TBL_NAME ||' A '
                           ||'   SET CP   =   (SELECT   CP_I
                                                 FROM  SAM.PROD_TBL
                                                WHERE  A.PROD_I = PROD_I)
                          WHERE A.PROD_I IN ( SELECT PROD_I
                                                FROM SAM.PROD_TBL) ';
EXECUTE IMMEDIATE V_SQL_STMT1 ;
END; When i execute this by passing a table name as a parameter, it gives me an error that "Table or View does not exists".
I can access SAM.PROD_TBL in my schema when i query using SELECT statement.
Also, I can use the same update statement outside the procedure and it works fine without giving me any error.
Is there something i am missing here and hence the error.
Kindly suggest how to overcome this error.
Regards,
Shane

Answer 1

Your privilege on this table needs to have been granted directly to the user not via a role.
In addition, debugging may be made easier by logging or outputting this sql so that you can verify that it's correct and runs correctly via a sql session.