How to Use Table name at run time

Question

Hi All
I have created a function that accepts a table name as a parameter and returns the maximam sequence number, but in my function body i can not write the parameter name as a table i.e.
CREATE OR REPLACE FUNCTION MAX_ID(TAB_NAME Varchar)
RETURN Number IS
max_id Number;
CURSOR curSalPoint IS
     SELECT MAX(EMP_NUMBER)
     FROM TAB_NAME ;
BEGIN
max_id:=0;
OPEN curSalPoint ;
     FETCH curSalPoint INTO max_id;
     CLOSE curSalPoint;
RETURN max_id
END
But it will give an error saying
(1):PL/SQL: ORA-00942: table or view does not exist
for "TAB_NAME"
Any help would be appreciate ........

Answer 1

Yes, as i contcatinated table name with the original statement, so you can also continate fields' names with your statment and execute immediate the statement.
Sorry i forgot this statement in my function, to execute the statement you need to include following statement
CREATE OR REPLACE FUNCTION MAX_ID(TAB_NAME Varchar)
RETURN Number IS
max_id Number;
query varchar2(200);
BEGIN
max_id:=0;
query:=null;
query := query || 'select max(empno) into max_id from'|| tab_name;
EXECUTE IMMEDIATE query;
RETURN max_id;
END;
Message was edited by:
Salman Qureshi