From: | Paul Jungwirth <pj(at)illuminatedcomputing(dot)com> |
---|---|
To: | David Fetter <david(at)fetter(dot)org> |
Cc: | Jeff Davis <pgsql(at)j-davis(dot)com>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: range_agg |
Date: | 2019-07-10 14:55:11 |
Message-ID: | dfaeb39a-4be3-4d9d-fa4c-687fd5446071@illuminatedcomputing.com |
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Thread: | |
Lists: | pgsql-hackers |
On 7/9/19 11:24 PM, David Fetter wrote:
>>> I seem to recall that the usual convention (at least in math) is
>>> to use intervals that are generally represented as open on the
>>> infinity side, but that might not fit how we do things.
>>
>> I think it does, unless I'm misunderstanding?
>
> Oh, I was just wondering about the square bracket on the left side of
> [null, 1). It's not super important.
Ah, I understand now. Just a typo on my part. Thanks for catching it,
and sorry for the confusion!
>>> !mr , perhaps?
>>
>> I like that suggestion. Honestly I'm not sure we even want an inverse,
>> but it's so important theoretically we should at least consider
>> whether it is appropriate here. Or maybe "inverse" is the wrong word
>> for this, or there is a different meaning it should have.
>
> Jeff's suggestion of ~ for complement is better.
Okay, thanks. I like it better too.
Yours,
--
Paul ~{:-)
pj(at)illuminatedcomputing(dot)com
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