Re: [BUGS] BUG #14632: Plus and minus operators inconsistency with leap years and year intervals. - Mailing list pgsql-bugs

>>>>> "Pietro" == Pietro Pugni <pietro.pugni@gmail.com> writes:
Pietro> The whole point (for leap years) is:
Pietro>  - inconsistency (adding and subtracting the same quantity to aPietro>  date should provide the date itself,
butit doesn't);
 

It should be obvious that this is mathematically impossible; a function
from a larger set (the 366 days of a leap year) to a smaller one (the
365 days of a common year) cannot have an inverse.

-- 
Andrew (irc:RhodiumToad)


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