Klint Gore <kg(at)kgb(dot)une(dot)edu(dot)au> writes:
> (Someone who knows more than I do might comment on what happens
> to unqualfied field names when the add missing from brings in another
> field with the same name?)
Nothing --- it's always been the case that unqualified field names have
to reference one of the explicitly-listed FROM tables.
regards, tom lane