Re: the '::' cast doesn't work in the FROM clause - Mailing list pgsql-bugs

Merlin Moncure <mmoncure@gmail.com> wrote:

> yeah, that's the correct way, but why does this work?
> select val from random() as val;

If you look at the PostgreSQL reference docs for the SELECT
statement, a from_item can be a SELECT statement in parentheses or a
function call (among other things).  It cannot be an arbitrary
expression containing operators (like ::).

-Kevin