Alvaro Herrera <alvherre@commandprompt.com> writes:
> Michael Glaesemann wrote:
>> How about something like gensym?
> It is dangerous to provide a synthetic name; if the standard ever gets
> modified to support alias-less subqueries, they would likely choose a
> different name-generating algorithm, and we would have a
> backward-compatibility problem.
I concur. If we do this, the thing to do is have *no* alias, ie, there
is no way to qualify the names of the subquery output columns. (IIRC
unaliased joins already work approximately like that.) Then there's
not anything to have a backward compatibility problem with.
regards, tom lane
