APEX

I create a classic report that query type "PL/SQL function body return sql query" in APEX. Now i want to pass item value to PL/SQL function body. My item contain list of table name. When i select a table name report must show data from the selected table. example-

DECLARE
     l_query VARCHAR2(400);
BEGIN
     l_query := 'SELECT * FROM '||:P_ITEM_NAME;
  RETURN l_query;
END;

but when i create this type report got this error "ORA-00903: invalid table name". 

Actually i don't know, is it possible to create this type of report. or any idea how to create this type of report.