In the following example, a DATE literal is cast as PERIOD(TIMESTAMP(4)). The result beginning bound is formed from the DATE literal and a time portion of zero. The result ending element is set to the result beginning bound plus INTERVAL '0.0001' SECOND.
SELECT CAST(DATE '2005-02-03' AS PERIOD(TIMESTAMP(4)));
The following PERIOD(TIMESTAMP(4)) value is returned:
('2005-02-03 00:00:00.0000', '2005-02-03 00:00:00.0001')