On 2012-11-06, Kevin Grittner <kgri...@mail.com> wrote:
> hari.fu...@gmail.com
>
>> No: the result of e.g.
>> 
>>  SELECT TIMESTAMPTZ '2012-10-28 01:30:00' + INTERVAL '24 hours';
>> 
>> depends on the client's timezone and its DST rules.
>
> Can you give an example of where adding an interval based on *hours*
> to TIMESTAMP WITH TIME ZONE would give a different value based on
> client's time zone and DST rules? If there is such a case, we have a
> bug, IMO.

the problem is with the value of  TIMESTAMPTZ '2012-10-28 01:30:00' 
more than how the addition is handled.

> Now, if you wanted to argue that *this* query might depend on time
> zone information, I'd be more willing to believe it, and maybe the
> problem is that we use the same function for both:
>
> SELECT TIMESTAMPTZ '2012-10-28 01:30:00' + INTERVAL '1 day';

even done right (with a timezone in the left argument) that one's
going to be locale dependant.


-- 
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