Re: SQL feature requests

"Ben Tilly" <btilly@gmail.com> writes:
> ... But then I need this (possibly
> empty) list to have a valid group by statement at the end.  In Oracle
> I used to just write it like this:

>   SELECT ...
>   GROUP BY $possible_term_1
>     $possible_term_2
>     $possible_term_3
>     'end of possible groupings'

FWIW, that will work if you write it as
'end of possible groupings'::text

I'm disinclined to accept it as-is because (a) it's highly likely to be
a mistake, and (b) there's no principled way to assign a datatype to the
expression, if we are to interpret it as an expression.

Basically anything but an unadorned constant will work there.
        regards, tom lane