Scott Marlowe wrote: > On Wed, 2006-03-01 at 14:18, Bruce Momjian wrote: > > Stephan Szabo wrote: > > > > justify_days doesn't currently do anything with this result --- it > > > > thinks its charter is only to reduce day components that are >= 30 days. > > > > However, I think a good case could be made that it should normalize > > > > negative days too; that is, the invariant on its result should be > > > > 0 <= days < 30, not merely days < 30. > > > > > > What about cases like interval '1 month -99 days', should that turn into > > > interval '-3 mons +21 days' or '-2 mons -9 days'? > > > > I think it should be the later. It is best to have a single sign, and I > > think it is possible in all cases: > > > > '2 mons -1 days' > > > > could be adjusted to '1 mons 29 days'. > > There's a part of me that thinks the WHOLE THING should be positive or > negative: > > -(2 months 1 day)
But it isn't '-2 months, -1 day'. I think what you are saying is what I am saying, that we should make the signs consistent. -- Bruce Momjian http://candle.pha.pa.us SRA OSS, Inc. http://www.sraoss.com + If your life is a hard drive, Christ can be your backup. + ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
