Slick left/right/outer joins with Option

Question

In the Slick examples there are a few examples of joining where one of the resulting columns can be nulls, as it can be the case when doing left, right, or outer joins. For

Answer 1

In addition to the answer above: In case you have a class which extends Table and your * projection looks something like this:

def * = (col1, col2, col3)

than your ? function would look like:

def ? = (col1.?, col2.?, col3.?)

If you have defined such a function you can write:

for {
    (x,y) <- x leftJoin y on (...)
} yield (x, y.?)