Bitwise OR among results

Question

I'm wondering if it's possible to do a bitwise OR among MySQL query. I have a query like:

SELECT `value` FROM `table` WHERE `code`='4'

It returns an array of values, but I want a unique value with the bitwise OR of all values. Is is possible from MySQL or should I delegate to PHP?

I.e. The query above returns this list of values:

value
-----
1
5
4
2
7
8

And I want as a result the OR of these values 1 | 5 | 4 | 2 | 7 | 8 = 15

Answer 1

SELECT MAX(@r:=@r|value) FROM `table`, (SELECT @r:=0) x

Jim.H's suggestion is much better. Thanks!

SELECT BIT_OR(value) FROM `table`