Re: SQL/JSON features for v15

From: Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>
To: Andres Freund <andres(at)anarazel(dot)de>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, "Jonathan S(dot) Katz" <jkatz(at)postgresql(dot)org>, Nikita Glukhov <n(dot)gluhov(at)postgrespro(dot)ru>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Michael Paquier <michael(at)paquier(dot)xyz>, John Naylor <john(dot)naylor(at)enterprisedb(dot)com>, Amit Langote <amitlangote09(at)gmail(dot)com>
Subject: Re: SQL/JSON features for v15
Date: 2022-08-23 17:38:35
Message-ID: CAFj8pRDyv7vsSmN8RcpugOCctM-UudV58z14pyvJz2ZtwXPCpg@mail.gmail.com
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út 23. 8. 2022 v 19:27 odesílatel Andres Freund <andres(at)anarazel(dot)de> napsal:

> Hi,
>
> On 2022-08-23 18:06:22 +0200, Pavel Stehule wrote:
> > The errors that should be handled are related to json structure errors. I
> > don't think so we have to handle all errors and all conversions.
> >
> > The JSON knows only three types - and these conversions can be written
> > specially for this case - or we can write json io routines to be able to
> > signal error
> > without an exception.
>
> I think that's not true unfortunately. You can specify return types, and
> composite types can be populated. Which essentially requires arbitrary
> coercions.
>

Please, can you send an example? Maybe we try to fix a feature that is not
required by standard.

Regards

Pavel

>
> Greetings,
>
> Andres Freund
>

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