Re: Please add example

On Thu, Sep 5, 2019 at 03:58:22PM +0000, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/11/functions-formatting.html
> Description:
>
> On this screen:
> https://www.postgresql.org/docs/11/functions-formatting.html
>
> Please consider adding this as an example:
> to_char( (now()-INTERVAL '10 minutes') AT TIME ZONE
> 'UTC','YYYY-MM-DD"T"HH24:MI')
>
> Output: 2019-09-05T15:43
>
> Why:
> This will demonstrate not only formatting but how to deal with converting
> your local timestamp to other timestamps and how to get times relative to
> the current time. This is extremely helpful as a way to deal with so many
> external system that need UTC time zones like AWS while your database uses
> local time zones.
>
> This example would have totally changed how I would have dealt with many
> issues in my software. But since the example did not exist I had no idea I
> could have went down this path.

I did improve the AT TIME ZONE docs in 2018:

commit dd6073f22a
Author: Bruce Momjian <bruce(at)momjian(dot)us>
Date: Tue Sep 4 22:34:07 2018 -0400

docs: improve AT TIME ZONE description

The previous description was unclear. Also add a third example, change
use of time zone acronyms to more verbose descriptions, and add a
mention that using 'time' with AT TIME ZONE uses the current time zone
rules.

Backpatch-through: 9.3

and you can see the results here:

https://www.postgresql.org/docs/11/functions-datetime.html#FUNCTIONS-DATETIME-ZONECONVERT

I am not sure it helps to try to show AT TIME ZONE behavior in the
to_char docs.

--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com

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