On Saturday, November 6, 2021, Jaime Casanova <jcasa...@systemguards.com.ec> wrote:
> Ok, subject was a bit philosophical but this message I just found is > quite confusing. > > """ > regression=# select cast(null as anyrange) &> cast(null as anymultirange); > ERROR: argument declared anymultirange is not a multirange type but type > anymultirange > """ > > I get that it is hard to parse but it is unambiguously correct. It does seem to presume that one understands how polymorphic pseudo-types work (the supplied query was written without that knowledge applied). I can envision some improvements here though it would depend a lot on the actual implementation. I’m also curious as to why we get as far the operator invocation when casting literals to polymorphic pseudo-types is supposedly an invalid thing to do. David J.
