From: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> |
---|---|
To: | David Fetter <david(at)fetter(dot)org> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL Development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Finer grain log timestamps |
Date: | 2022-06-20 11:05:14 |
Message-ID: | 20220620110514.athzygshxtln3yt6@alvherre.pgsql |
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Lists: | pgsql-hackers |
On 2022-Jun-14, David Fetter wrote:
> On Mon, Jun 13, 2022 at 04:22:42PM -0400, Tom Lane wrote:
> > A different line of thought is to extend %t to provide a precision
> > field a la sprintf, so that for example "%.3t" is equivalent to
> > "%m" and "%.6t" does what David wants, and we won't have to
> > search for a new escape letter when the day arrives that
> > somebody wants nanosecond resolution. The same could be done
> > with %n, avoiding the need to find a different escape letter
> > for that.
>
> I'll build this more sprintf-like thing if not doing so prevents the
> change from happening, but frankly, I don't really see a point in it
> because the next "log timestamps at some random negative power of 10
> second granularity" requirement I see will be the first.
Do we *have* to provide support for arbitrary numbers of digits, though?
We could provide support for only %.3t and %.6t specifically, and not
worry about other cases (error: width not supported). When somebody
wants %.9t in ten years, we won't have to fight for which letter to
pick. And I agree that widening %m for everybody without recourse is
not great.
--
Álvaro Herrera Breisgau, Deutschland — https://www.EnterpriseDB.com/
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