Re: "two time periods with only an endpoint in common do not overlap" ???

From: Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com>
To: Ron <ronljohnsonjr(at)gmail(dot)com>, "pgsql-generallists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: Re: "two time periods with only an endpoint in common do not overlap" ???
Date: 2021-10-16 16:24:44
Message-ID: 4ad064ba-1650-cefd-2c44-db909937f90a@aklaver.com
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On 10/15/21 21:54, Ron wrote:

>>
>>
>> There is no straight time range, you would have to use tsrange or
>> tstzrange. The principle still holds though you can make ranges
>> overlap or not depending on '[)' or '[]'.
>
> OP refers to the OVERLAP operator (is it an operator), not the tsrange()
> function.
>

Your statement was:

"The numeric ranges 0-10 and 10-19 overlap, just as the time ranges
00:01:00-00:00:02:00 overlaps 00:02:00-00:03:00."

I was just pointing out that is not necessarily true. As was pointed out
upstream there are good reasons for not having 1:00-2:00 and 2:00-3:00
overlap.

As David pointed out it is about following the documented behavior. I
still have to remember, on occasion, that BETWEEN actually includes the
end points not just points in between them.

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com

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