On 10/05/2018 13:47, Vlad Khorsun via Firebird-devel wrote: > 10.05.2018 19:23, Adriano dos Santos Fernandes wrote: >> On 10/05/2018 13:12, Vlad Khorsun via Firebird-devel wrote: >>> >>> I guess the question is about the case when users have historical >>> data >>> and need to apply old time zone rule to the old data and new timezone >>> rule >>> to the new data. >>> >>> Is it possible\make sence to add a datetime field with "valid from" >>> mark ? Or something like that, some kind of version mark. >>> >> I really don't understood what you mean. >> >> Please give more practical example. > > Look how MSK time zone was changed at 2014.10.26 > > https://www.timeanddate.com/time/zone/russia/moscow > > I think about something like this: > > ID Name Valid from Offset > ... MSK 2011.03.27 02:00 +4 > ... MSK 2014.10.26 02:00 +3 > > Is it makes sence ?
America/Sao_Paulo changes every year because DST (when starting to -02 and ending to -03). This is not a problem. The feature is very aware about it. But there is some timestamps that are ambiguous (*1) and some are invalid (*2) when you enter it as text, but as soon it's converted it's stored in UTC and there is no problem anymore. *1 Currently consistently resolved to one of them - cannot explain better right now *2 Currently converted instead of throw an exception - cannot explain better right now Adriano ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot Firebird-Devel mailing list, web interface at https://lists.sourceforge.net/lists/listinfo/firebird-devel
