The following bug has been logged on the website: Bug reference: 6420 Logged by: Thomas McGlynn Email address: tom.mcgl...@nasa.gov PostgreSQL version: 9.1.2 Operating system: Any Description:
As part of our preparations for the leap second this year I wanted to see how Postgres handles this. The only information I could see was (Technically, PostgreSQL uses UT1 because leap seconds are not handled.) in section 9.9 of the manual. This seems to be a misapprehension of what the UT1 time system is. UT1 measures mean solar time -- days are not exactly 86400 seconds long. Currently UT1 and UTC never differ by more than one second. Leap seconds are the way this correspondence is kept. What I believe you should be saying is that you use TAI -- atomic time -- with some offset. If my inferences from the documentation is correct and Postgres measures the number of seconds from UTC 2000-01-01, then the time system used is TAI-32 seconds. See http://stjarnhimlen.se/comp/time.html for details (and to check whether I got the sign right!). I think this should be clearly stated in the documentation when discussing the time types but I did not see it. Regards... -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs
