public inbox for [email protected]  

help / color / mirror / Atom feed

From: Bruno Wolff III <[email protected]>
To: Dominique Devienne <[email protected]>
Cc: [email protected]
Subject: Re: COPY documentation with regard to references constraints
Date: Thu, 31 Oct 2024 07:20:02 -0500
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAFCRh-9dwBkb73x+ckFCn-SDy=n8Fpg3XcGfFAT+MWOm+jp-Tw@mail.gmail.com>
References: <[email protected]>
	<CAFCRh-9dwBkb73x+ckFCn-SDy=n8Fpg3XcGfFAT+MWOm+jp-Tw@mail.gmail.com>

On Thu, Oct 31, 2024 at 13:15:34 +0100,
  Dominique Devienne <[email protected]> wrote:
>
>AFAIK, DEFERRABLE is for temporary violations crossing statement boundaries,
>to postpone the enforcement of FKs at COMMIT time of the transaction.
>
>While a single COPY is just one statement, so whether a temporary violation
>for self-referential FKs would occur would be implementation-dependent,
>and thus "neither logical" nor predictable.
>
>Applies to other statement types too.

Thanks. I needed to look more carefully under deferrable where it says 
the following:
This controls whether the constraint can be deferred. A constraint that is 
not deferrable will be checked immediately after every command.

That is pretty clear.

view thread (2+ messages)

reply

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Reply to all the recipients using the --to and --cc options:
  reply via email

  To: [email protected]
  Cc: [email protected], [email protected], [email protected]
  Subject: Re: COPY documentation with regard to references constraints
  In-Reply-To: <[email protected]>

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

This inbox is served by agora; see mirroring instructions
for how to clone and mirror all data and code used for this inbox