Michael Glaesemann <grzm@xxxxxxxxxxxxxxx> writes:
> Note that interval '1 day' is not equal to interval '24 hours'. '1
> day' can be 23 or 25 hours across daylight saving time boundaries.
When you are adding to timestamp without time zone, they *are*
interchangeable, since no daylight-savings arithmetic is involved.
Michael's right for the case of adding to timestamp with time zone,
though.
> Do you *really* want timestamp without time zone?
I agree with that comment --- you should at least think hard
about what you are trying to represent. The "date" type is also
worth considering if time-of-day isn't so important to you.
regards, tom lane
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