Re: Make year 01/01/0001 but leave timestamp alone

John DeSoi <desoi(at)pgedit(dot)com> writes:
> On Aug 2, 2005, at 11:49 AM, Walker, Jed S wrote:
>> I have a situation where we have a timestamp column but in special
>> cases we want to set the date to '01/01/0001' and leave the
>> timestamp alone. For example, '11/04/2005 10:30:05' would become
>> '01/01/0001 10:30:05'. I've been going through the various date
>> time functions but don't see a simple way to do this. Can someone
>> help?

> select ('0001-01-01 ' || now()::time::text)::timestamp;

This textual pasting makes me itch ... try something like

select '0001-01-01'::timestamp + now()::time;
?column?
----------------------------
0001-01-01 16:56:16.313866
(1 row)

regards, tom lane