count() counts ROW values that are NULL

https://www.postgresql.org/docs/current/functions-aggregate.html#FUNCTIONS-AGGREGATE-TABLE

The manual says:

count ( "any" ) → bigint
>
> Computes the number of input rows in which the input value is not null.
>

But ROW values or composite types that "are null" are counted, anyway. See:

*db<>fiddle [here](
https://dbfiddle.uk/?rdbms=postgres_14&fiddle=7364f3f582322ac687b39c677826a074)*

Feels like a bug, but I cannot imagine how this would have slipped
everybody's attention for so long. It should at least be documented. Maybe:

Computes the number of input rows in which the input value is not a plain
NULL value. (Composite or ROW values count in any case - even if value IS
NULL evaluates to true.)

Regards
Erwin