Re: Intervals and ISO 8601 duration

On Fri, Jan 13, 2023 at 2:41 PM Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
wrote:

> > (I'm asking because of an issue that came up about intervals that were
> > "equal but not identical.")
>
> 1) Can you provide an example?
>
>
Here's an example. Note that they come out formatted differently with
to_char, but evaluate as equal. The explanation(1) was that they were
Equal but not Identical. I was thinking getting the raw data about how
they are stored would get at the identicality issue:

WITH inters AS (
SELECT
'1 day 2 hours'::interval AS i1,
'26 hours'::interval AS i2
)
SELECT
*,
to_char(i1,'HH24:MM:SS') AS i1_char,
to_char(i2,'HH24:MM:SS') AS i2_char,
i1=i2 AS "Equal?"
FROM inters;

i1 | i2 | i1_char | i2_char | Equal?
----------------+----------+----------+----------+--------
1 day 02:00:00 | 26:00:00 | 02:00:00 | 26:00:00 | t

(1)
https://www.postgresql.org/message-id/flat/CAJKTcg9jLfH%2B-v8TS2gV%3DvZzqjLZ5cYyMVUtGxwyRitER5htMg%40mail.gmail.com

Cheers,
Ken

>
> >
> > Cheers,
> > Ken
> >
> >
>
> --
> Adrian Klaver
> adrian(dot)klaver(at)aklaver(dot)com
>
>

--
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