public inbox for [email protected]  

help / color / mirror / Atom feed

From: Ayush Tiwari <[email protected]>
To: Fujii Masao <[email protected]>
Cc: [email protected]
Subject: Re: Document COPY FROM WHERE restrictions on generated and system columns
Date: Thu, 2 Jul 2026 18:46:41 +0530
Message-ID: <CAJTYsWXij=ZzKDqVMTyGR7=Suf5CJfezBYHyf7+2GWk_CPpUVw@mail.gmail.com> (raw)
In-Reply-To: <CAHGQGwEgxErc54yVOAVWCsr1O=8pgw4oKRPuEQ9mfhkoYGR_XA@mail.gmail.com>
References: <CAHGQGwEgxErc54yVOAVWCsr1O=8pgw4oKRPuEQ9mfhkoYGR_XA@mail.gmail.com>

Hi,

On Thu, 2 Jul 2026 at 18:41, Fujii Masao <[email protected]> wrote:

> Hi,
>
> I found that generated columns and system columns cannot be used in
> COPY FROM WHERE expressions, but the COPY docs still mentions
> only the restriction on subqueries.
>
> So I've created the attached patch which updates the docs to also list
> generated columns and system columns as unsupported in COPY FROM WHERE
> expressions.
>
> Since generated columns have been rejected in COPY FROM WHERE since
> v13, that docs change should be backpatched to all supported branches.
> But the system-column restriction was introduced in v19, so that part
> does not need to be backpatched.
>
> Thoughts?
>

Thanks for the patch!

I think it makes sense to add the system columns and generated
columns limitation to the documentation, patch LGTM.

Regards,
Ayush

view thread (3+ messages)  latest in thread

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: Document COPY FROM WHERE restrictions on generated and system columns
  In-Reply-To: <CAJTYsWXij=ZzKDqVMTyGR7=Suf5CJfezBYHyf7+2GWk_CPpUVw@mail.gmail.com>

* 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