| From: | Richard Guo <guofenglinux(at)gmail(dot)com> |
|---|---|
| To: | "Ian R(dot) Campbell" <ian(dot)campbell(at)thepathcentral(dot)com> |
| Cc: | PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Documentation error |
| Date: | 2022-10-21 01:05:43 |
| Message-ID: | CAMbWs4-V6M7hCdOgU5a0QHiKCywzV83DhP5-EYVWcS-2Fo0nPw@mail.gmail.com |
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| Lists: | pgsql-bugs |
On Thu, Oct 20, 2022 at 11:32 AM Richard Guo <guofenglinux(at)gmail(dot)com> wrote:
> On Wed, Oct 19, 2022 at 10:07 PM Ian R. Campbell <
> ian(dot)campbell(at)thepathcentral(dot)com> wrote:
>
>> Please see this documentation page:
>> https://www.postgresql.org/about/featurematrix/detail/392/
>>
>> It states, "By default, NULL values are not treated as distinct entries."
>>
>> It should state, "By default, NULL values are treated as distinct
>> entries."
>>
>
> Correct. +1. Good catch.
>
The second sentence in this page is also incorrect.
"Specifying NULLS NOT DISTINCT on unique indexes / constraints will
cause NULL values to be treated distinctly."
It really should be:
"Specifying NULLS NOT DISTINCT on unique indexes / constraints will
cause NULL values to not be treated distinctly."
Thanks
Richard
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