> > date -> timestamp[tz]: I'm suspicious of this one, but it's hard to
> > explain. The definition to fill in the time component with zeros is
> > reasonable, but it's not the same thing as casting integers to floats
> > because dates really represent a time span of 24 hours and timestamps an
> > indivisible point in time. I suggest making this non-implicit, for
> > conformance with SQL and for general consistency between the date/time
> > types.
>
> Althought I'm sure there's _loads_ of people using this conversion,
> including me in various random places in the codebase.
Actually, if inserting counts as an explicit conversion, then maybe not...
