čt 31. 1. 2019 v 15:33 odesílatel Andrew Gierth <and...@tao11.riddles.org.uk> napsal:
> >>>>> "Pavel" == Pavel Stehule <pavel.steh...@gmail.com> writes: > > Pavel> Hi > Pavel> I have a value '400 days 30 sec':: interval > > Pavel> I don't understand why cast > > Pavel> postgres=# select '400days 30sec'::interval minute to second; > > ... > > Pavel> What is sense of this feature? > > As far as I know it only exists because of the sql spec, and the > implementation has never been complete or working. I think it does > affect some input parsing cases, there are some nasty hacks here and > there to support it, but given that our intervals don't behave like the > spec's ones anyway, there seems to be little motivation to make it work > fully. > yes - it looks little bit bizarre > > These work, for example: > > select interval '4' year to month; -- 4 months > select interval '4' hour; -- 4 hours > select interval '4' hour to second; -- 4 seconds > select '4'::interval year to month; -- 4 months > etc. > > thank you for info Pavel -- > Andrew (irc:RhodiumToad) >
