Re: Record returning function accept not matched columns declaration

"David G. Johnston" <david.g.johnston@gmail.com> writes:
> On Thursday, February 29, 2024, PetSerAl <petseral@gmail.com> wrote:
>> postgres=# with a(b) as (values (row(1,2,3)))
>> postgres-# select * from a, coalesce(b) as c(d int,e int, f int)
>> postgres-# union all
>> postgres-# select * from a, nullif(b, null) as c(d int,e int, f int)
>> postgres-# union all
>> postgres-# select * from a, unnest(array[b]) as c(d int,e int, f int)
>> postgres-# union all
>> postgres-# select * from a, json_populate_record(b, null) as c(d int,e
>> int, f int); --expect OK

> My concern with all of this is accepting the specification of column
> definitions for functions that don’t return the record pseudo-type.

Hm?  These cases all *do* return record, because that's what a.b is
typed as.