On 1/13/23 15:32, Ken Tanzer wrote:
On Fri, Jan 13, 2023 at 3:03 PM Adrian Klaver <adrian.klaver@xxxxxxxxxxx
<mailto:adrian.klaver@xxxxxxxxxxx>> wrote:
WITH inters AS (
SELECT
'1 day 2 hours'::interval AS i1,
'26 hours'::interval AS i2,
justify_interval('1 day 2 hours'::interval) AS ij1,
justify_interval('26 hours'::interval) AS ij2
)
SELECT
*,
to_char(justify_interval(i1),'HH24:MM:SS') AS i1_char,
to_char(justify_interval(i2),'HH24:MM:SS') AS i2_char,
i1=i2 AS "Equal?"
i1 | i2 | ij1 | ij2 | i1_char
| i2_char | Equal?
----------------+----------+----------------+----------------+----------+----------+--------
1 day 02:00:00 | 26:00:00 | 1 day 02:00:00 | 1 day 02:00:00 |
02:00:00
| 02:00:00 | t
I'm not quite sure what this is meant to convey. Maybe justify_hours
and justify_days will return something that uniquely maps to the raw
data, and maybe it doesn't (I can't figure that out!). But then there's
still no justify_seconds or something that would get at the raw
microseconds being stored.
And I could be wrong, but it seems like you were aiming towards making
these two intervals the same. I was trying to zero in on the
opposite--what is it that makes them different (not identical), and how
to access that information. I was assuming that if they were not
This:
WITH inters AS (
SELECT
'1 day 2 hours'::interval AS i1,
'26 hours'::interval AS i2
)
SELECT
i1=i2 AS "Equal?"
FROM inters;
say the intervals are equal.
If I am following what you want is to_char(<interval>,'HH24:MM:SS') to
be equal, correct?
identical, the internal representation in Months, Days and Microseconds
must be different--maybe that assumption is not valid. And maybe there
is currently no way to get that raw representation. If that's the case,
so be it, although I might then put in a small plug for it as a feature
request. :) (*)
Cheers,
Ken
(*) These are probably bad suggestions, but something like...
EXTRACT ( (RAWHOURS|RAWDAYS|RAWMICROSECONDS) ... ?
Or a function RAWEXTRACT( HOURS|DAYS|MICROSECONDS ) ?
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx <mailto:adrian.klaver@xxxxxxxxxxx>
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Adrian Klaver
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