Re: Polymorphic arguments and composite types - Mailing list pgsql-hackers

On Fri, 5 Oct 2007, Simon Riggs wrote:

> Because we already do exactly that here:
>
>     select 1, (select col2 from c), 3;
>
> The inner select returns a ROW, yet we treat it as a single column
> value.

The inner select does not return a row. It's not a <row subquery>, it's a
<scalar subquery>.