=?ISO-8859-1?Q?Bj=F8rn?= T Johansen <btj@havleik.no> writes:
> But that was my initial question, "As far as I can tell, there is no way
> to solve this without also supplying a date or am I missing something?"
You could possibly do it without, using some logic like this:
1. compute MAX(time) - MIN(time)
2. if less than 12 hours, assume no midnight wraparound, sort by
straight time.
3. if more than 12 hours, assume a wraparound, sort accordingly.
But it seems a heck of a lot easier and less error-prone to store
a full timestamp instead. What's your motivation for storing only
time, anyway? Not space savings --- the time and timestamp types
are both 8 bytes in PG.
regards, tom lane