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From: Adrian Klaver <[email protected]>
To: [email protected]
To: [email protected]
Subject: Re: RFC 9557 / IXDTF
Date: Sun, 16 Nov 2025 13:12:23 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On 11/16/25 11:43, [email protected] wrote:
> Hello,
> 
> does postgres consider some sort of implementation of rfc9557 IXDTF?
> This is new time internet time format which extends timestamps with 
> timezone info together with the offset
> - https://datatracker.ietf.org/doc/html/rfc9557
> - https://en.wikipedia.org/wiki/RFC_9557#Usage
> 
> If not, is there some suggestion on how to best store information like 
> this?

select '1996-12-19T16:39:57-08:00[America/Los_Angeles]'::timestamp;
ERROR:  invalid input syntax for type timestamp: 
"1996-12-19T16:39:57-08:00[America/Los_Angeles]"

select '1996-12-19T16:39:57-08:00[America/Los_Angeles]'::timestamptz;
ERROR:  invalid input syntax for type timestamp with time zone: 
"1996-12-19T16:39:57-08:00[America/Los_Angeles]"

select '1996-12-19T16:39:57-08:00[America/Los_Angeles]'::varchar;
                     varchar
------------------------------------------------
  1996-12-19T16:39:57-08:00[America/Los_Angeles]


Your only option at this point would be to store as a string. That means 
though you lose out on using any of the Postgres datetime operators or 
functions, unless you do some regex to pull out the timezone portion and 
then use that with the datetime string to create a timestamp or 
timestamptz. I could see that being wrapped into a function.

> 
> Thanks,
> Miroslav
> 
> 


-- 
Adrian Klaver
[email protected]

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