Increment Table ID Field with Bitwise Counting

Question

I am working on a project where I need my ID column to be a power of 2 (1,2,4,8,16..). I know that we cannot offset the auto_increment but for simple a

Answer 1

To work around all the issues above, I was able to construct the following which works great!

DELIMITER $$
CREATE TRIGGER testbitcompatid BEFORE INSERT ON Table
    FOR EACH ROW 
    BEGIN
        SET @LAST_ROW = (SELECT MAX(id) FROM Table);
        SET NEW.id = CASE WHEN @LAST_ROW IS NULL THEN 1 ELSE @LAST_ROW * 2 END;

    END;
$$
DELIMITER ;

Pretty much, we take the highest id, grab the log(2) of it which gives us the corresponding AUTO_INCREMENT id. We then add 1, and power that up to 2.

I hope this helps prevent some headache down the road for others.