On 12/13/22 18:22, Tom Lane wrote:
"David G. Johnston" <david.g.johns...@gmail.com> writes:
I'm more keen on the idea of having the system understand when an ORDER BY
is missing - that seems like what users are more likely to actually do.
That side of it could perhaps be useful, but not if it's an unintelligent
analysis. If someone has a perfectly safe query written according to
the old-school method:
SELECT string_agg(...) FROM (SELECT ... ORDER BY ...) ss;
they are not going to be too pleased with a nanny-ish warning (much
less an error) saying that the aggregate's input ordering is
underspecified.
That is a good point
I also wonder whether we'd accept any ORDER BY whatsoever, or try
to require one that produces a sufficiently-unique input ordering.
I would accept anything. agg(x order by y) is a common thing.
--
Vik Fearing
