From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
---|---|
To: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
Cc: | alexey(dot)shishkin(at)enterprisedb(dot)com, pgsql-docs(at)lists(dot)postgresql(dot)org |
Subject: | Re: correction suggestion for https://www.postgresql.org/docs/17/auth-username-maps.html |
Date: | 2025-07-09 16:22:07 |
Message-ID: | 1145313.1752078127@sss.pgh.pa.us |
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Lists: | pgsql-docs |
"David G. Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> writes:
> On Wed, Jul 9, 2025 at 7:56 AM PG Doc comments form <noreply(at)postgresql(dot)org>
> wrote:
>> Pls. let me suggest the correction for the
>> https://www.postgresql.org/docs/17/auth-username-maps.html page.
>> It has the following sentence:
>> '
>> If the database-username field starts with a slash (/), the remainder of
>> the
>> field is treated as a regular expression (see Section 9.7.3.1 for details
>> of
>> PostgreSQL's regular expression syntax). It is not possible to use \1 to
>> use
>> a capture from regular expression on system-username for a regular
>> expression on database-username.
>> '
>> It looks like 'to use a capture' has to be replaced by 'to capture'.
>> best regards
> What is written is factually correct. Your suggestion makes it
> incorrect; and wouldn't be good English even if it was.
The existing sentence is pretty mangled English, though. I think
it would be clearer as
When the database-username field is a regular expression, it is
not possible to use \1 within it to refer to a capture from
the system-username field.
Thoughts?
regards, tom lane
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