Is it possible to perform a bitwise group function?

Question

I have a field in a table which contains bitwise flags. Let\'s say for the sake of example there are three flags: 4 => read, 2 => write, 1 => execute a

Answer 1

And you can do a bitwise or with...

FUNCTION BITOR(x IN NUMBER, y IN NUMBER)
RETURN NUMBER
AS
BEGIN
    RETURN x + y - BITAND(x,y);
END;