Re: psql JSON output format

From: Stefan Keller <sfkeller(at)gmail(dot)com>
To: Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>
Cc: Christoph Berg <myon(at)debian(dot)org>, Robert Haas <robertmhaas(at)gmail(dot)com>, Dean Rasheed <dean(dot)a(dot)rasheed(at)gmail(dot)com>, Jelte Fennema-Nio <postgres(at)jeltef(dot)nl>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Joe Conway <mail(at)joeconway(dot)com>
Subject: Re: psql JSON output format
Date: 2024-01-23 14:35:17
Message-ID: CAFcOn2_fOjdyEhLkqFnSgRmY40g-v1jB8oDtZpZpQtSJEDC3JQ@mail.gmail.com
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Am Di., 23. Jan. 2024 um 15:15 Uhr schrieb Laurenz Albe
<laurenz(dot)albe(at)cybertec(dot)at>:
> I understand the motivation, but I bet it's not what will make users
> happy.
>
> If you need to disambiguate between SQL NULL and JSON null, my
> preferred solution would be to omit SQL NULL columns from the output
> altogether.

I fully support Laurenz's proposal and argumentation. The main use
case for such a JSON output feature is further processing somewhere
else.

--Stefan

Am Di., 23. Jan. 2024 um 15:15 Uhr schrieb Laurenz Albe
<laurenz(dot)albe(at)cybertec(dot)at>:
>
> On Mon, 2024-01-22 at 16:19 +0100, Christoph Berg wrote:
> > What I did now in v3 of this patch is to print boolean and numeric
> > values (ints, floats, numeric) without quotes, while adding the quotes
> > back to json. This solves the NULL vs 'null'::json problem.
>
> The patch is working as advertised.
>
> I am kind of unhappy about this change. It seems awkward and undesirable
> so have JSON values decorated with weird quoting in JSON output.
> I understand the motivation, but I bet it's not what will make users
> happy.
>
> If you need to disambiguate between SQL NULL and JSON null, my
> preferred solution would be to omit SQL NULL columns from the output
> altogether.
>
> Yours,
> Laurenz Albe
>
>

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