Hannu Krosing wrote: > ?hel kenal p?eval, K, 2006-03-01 kell 15:18, kirjutas Bruce Momjian: > > 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'. > > But unfortunately '2 mons -1 days' <> '1 mons 29 days' > > If I want something to happen 1 day less than two months from dome date, > then the only way to say that consistently *is* '2 mons -1 days'.
Right, but you asked to justify the days by calling the function. -- 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 3: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq