On 01/11/2020 22:47, Tom Lane wrote:
> With that, we don't actually need aggregate_dummy() to exist at
> all, because it's never referenced. Having "aggregate_dummy"
> as the prosrc value for an aggregate function is now just a
> random convention; any other string would do as well. (We could
> save a few bytes in pg_proc by choosing a shorter string, but
> probably it's better to stick to the existing convention.)
NULL would seem like the natural value for that.
- Heikki