Re: Interval month, week -> day

Michael Glaesemann <grzm(at)seespotcode(dot)net> writes:
> I came across some behavior that seems counterintuitive to me:

> test=# select '1.5 mon'::interval;
> interval
> -----------------
> 1 mon 360:00:00
> (1 row)

> With the time/day/month interval struct introduced in 8.1, I'd expect
> this to return '1 mon 15 days'. The reason is that the DecodeInterval
> converts fractional months to time directly, rather than cascading
> first to days.

I agree that this seems like an oversight in the original
months/days/seconds patch, rather than behavior we want to keep.
But is DecodeInterval the only place with the problem? My recollection
is that there's a certain amount of redundancy in the datetime code ...

regards, tom lane