On Mon, 26 Sep 2005, Tom Lane wrote:

>             b) If SD is TIME WITHOUT TIME ZONE, then TV is SV, with
>               implementation-defined rounding or truncation if necessary.
> 
> So it's "implementation-defined" what we do.

Truncation would avoid the problem but of course loses some of the info.

So, what are the alternatives:

* Truncation.

* Rounding and let it wrap when rounding up towards midnight.

* Rounding and never let it wrap. The cases that would wrap
  goes to 23:59:59 (or 23:59:59.9 and so on for other precisions)
  or to 23:59:60 (or 23:59.60.9 and so on) if one start with a
  leap second time.

Are there any more viable cases?
 
-- 
/Dennis Björklund


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