Ejemplo 5: SRF en plpgsql (cont.)

SELECT * FROM intervalos
    ('2003-01-01', '2003-01-02', '3 hour')
    AS foo(inicio TIMESTAMP WITH TIME ZONE,
           fin TIMESTAMP WITH TIME ZONE);

         inicio         |          fin
------------------------+------------------------
 2003-01-01 00:00:00-03 | 2003-01-01 03:00:00-03
 2003-01-01 03:00:00-03 | 2003-01-01 06:00:00-03
 2003-01-01 06:00:00-03 | 2003-01-01 09:00:00-03
 2003-01-01 09:00:00-03 | 2003-01-01 12:00:00-03
 2003-01-01 12:00:00-03 | 2003-01-01 15:00:00-03
 2003-01-01 15:00:00-03 | 2003-01-01 18:00:00-03
 2003-01-01 18:00:00-03 | 2003-01-01 21:00:00-03
 2003-01-01 21:00:00-03 | 2003-01-02 00:00:00-03
(8 filas)