select timestamp '2005-09-23 23:59:59.9999999'

I get the following result (note the value of the seconds):

2005-09-23 23:59:60.00


It's the leap second.



It is not a leap second. Leap seconds are always either on the 30th of June or on the 31th of December.

Here there is a list of all the leap seconds so far:
http://en.wikipedia.org/wiki/Leap_second

And, in fact, the wrong result is the same for each date, regardless of the year, month or day.

--
Kouber Saparev
http://kouber.saparev.com/


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