MIME-Version: 1.0
References: <CAMfPbcbjTE6=yVJjAyiNU=kM24e-0oLo8S1ZZ7dJZy3UKq+b3g@mail.gmail.com>
 <bdef948d-27cb-46b4-9a6e-857c7e1e0d58@aklaver.com>
In-Reply-To: <bdef948d-27cb-46b4-9a6e-857c7e1e0d58@aklaver.com>
From: Samuel Marks <samuelmarks@gmail.com>
Date: Tue, 23 Sep 2025 15:56:05 -0500
Message-ID: <CAMfPbcZzUYZ6yoN-TnpNQZ4PzhFCCiTdchbtwz83+B0Byyk-fw@mail.gmail.com>
Subject: Re: How do I upsert depending on a second table?
To: Adrian Klaver <adrian.klaver@aklaver.com>
Cc: pgsql-general@lists.postgresql.org
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Archived-At: <https://www.postgresql.org/message-id/CAMfPbcZzUYZ6yoN-TnpNQZ4PzhFCCiTdchbtwz83%2BB0Byyk-fw%40mail.gmail.com>
Precedence: bulk

the AS syntax can alternatively be used for aliases
https://www.postgresql.org/docs/current/sql-select.html

`SELECT actual_tablename table0 WHERE table0.column00 =3D 1`

(I used a space)

On Tue, Sep 23, 2025 at 3:52=E2=80=AFPM Adrian Klaver <adrian.klaver@aklave=
r.com> wrote:
>
> On 9/23/25 13:36, Samuel Marks wrote:
> > Attempt:
> > ```sql
> > CREATE TABLE org
> > (
> >      "name"      VARCHAR(50) PRIMARY KEY,
> >      owner       VARCHAR(50) NOT NULL
> > );
> >
> > CREATE TABLE repo
> > (
> >      "id"           INTEGER PRIMARY KEY,
> >      full_name      VARCHAR(255) UNIQUE NOT NULL,
> >      org            VARCHAR(50)         NOT NULL REFERENCES org ("name"=
)
> > );
> >
> > INSERT INTO org(name, owner) VALUES ('org0', 'user0');
> >
> > INSERT INTO repo (id, full_name, org)
> > VALUES (0, 'org0/name0 by wrong user', 'org0')
> > ON CONFLICT (full_name) DO UPDATE
> >      SET full_name =3D EXCLUDED.full_name,
> >          org       =3D EXCLUDED.org
> > WHERE EXISTS (SELECT 1
> >                FROM org org_tbl
> >                WHERE org_tbl.name =3D EXCLUDED.org
> >                  AND org_tbl.owner =3D 'wrong user')
>
> Where is org_tbl?
>
> Or is this a copy and paste error?
>
> > RETURNING *;
> >
> > SELECT * FROM repo WHERE id =3D 0;
> > ```
> >
> > This all succeeds. It should fail because the 'wrong user' is trying
> > to create a new=E2=80=94or update an existing=E2=80=94repo.
> >
> > Thanks for all suggestions
> >
> >
>
>
> --
> Adrian Klaver
> adrian.klaver@aklaver.com