multimpe records output from a 'no-table' source

[Rafal Pietrak <rafal@xxxxxxxxxxxxxxxxxx>]

Hi all,

There is this functions like 'current_date', 'current_database', etc.
yielding a row of data without any table to source rows from. Like:
	dev=# SELECT current_date;
	    date    
	------------
	 2006-08-25
	(1 row)

Is there a way to get multiple rows? Like:
	dev=# SELECT current_date where date between now and yesterday;
	    date    
	------------
	 2006-08-24
	 2006-08-25
	(2 rows)
(of cource this is 'cooked' example, as I haven't figured out how to
achieve this).
Or:
	dev=# SELECT * where a::numeric between 1 and 3;
	    a    
	------------
	 1
	 3
	 2
	(3 rows)

-- 
-R