AW: UNIONS

> > select id, null as text from foo union select id, name from
> foo_child;
> > fails with
> > unable to trasform {insert whatever type here} into unknown
> > Each UNION | EXCEPT | INTERSECT clause must have
> compatible target
> > types
>
> The UNION type-resolution code could use some work; right now I think
> the algorithm is to use the types of the first SELECT and force
> everything else into that.

Imho this is expected behavior (maybe even standard). Very easy to
understand.

> A more symmetrical
> promote-to-common-supertype approach would be nice.

While this sounds sexy it is not what people would expect (imho),
and would have a magic touch to it.

Andreas