Re: AT TIME ZONE correction

On Sun, Sep  2, 2018 at 10:11:59PM -0400, Bruce Momjian wrote:
> On Sun, Sep  2, 2018 at 02:21:58PM -0400, Tom Lane wrote:
> > I still find this to be more confusing than helpful.  In particular,
> > I do not think that it's possible to explain this behavior clearly
> > without mentioning that timestamp with time zone values are always
> > stored in UTC and what AT TIME ZONE really does is convert between UTC
> > and the specified zone (in a direction dependent on which type is
> > supplied as argument).
> 
> Agreed.  The more I dig into this the more I learn.  I have developed
> the attached patch which I hope this time is an improvement.

I polished the text some more and changed the three-letter time zone
abbreviation (e.g., MST) to use the more general text, e.g.
"America/Denver".  We should not be encouraging people to specify the
daylight savings time status based on the date in the date/time string.

-- 
  Bruce Momjian  <bruce@momjian.us>        http://momjian.us
  EnterpriseDB                             http://enterprisedb.com

+ As you are, so once was I.  As I am, so you will be. +
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