On 2015/11/10 0:56, Robert Haas wrote:
> On Sat, Nov 7, 2015 at 12:07 PM, Corey Huinker <corey.huinker@gmail.com> wrote:
>> Sorry to barge in late, but I was wondering if what we've learned with this
>> patch can be applied to the case of asserting a sort order on a query
>> returning from dblink().
>
> Nope.
>
> Sorry to the bearer of bad news, but that would be a different and
> much harder development project. Set-returning functions have no way
> to indicate anything about the ordering of their return values at
> present. We could invent something, but the work involved wouldn't
> have much to do with this patch.
There was a patch (which, it seems, was rejected [1]) to do this sort of
thing.
Thanks,
Amit
[1] https://commitfest.postgresql.org/4/88/
