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help / color / mirror / Atom feedFrom: Adrian Klaver <[email protected]>
To: Colin 't Hart <[email protected]>
To: PostgreSQL General <[email protected]>
Subject: Re: Two sequences associated with one identity column
Date: Wed, 29 Oct 2025 09:28:33 -0700
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAMon-aQ0Zs-Otkp1=zk3WYt7Am-_oQHKEmD_rZ1CNGBAgM_jzw@mail.gmail.com>
References: <CAMon-aTbZC5k2pLpijk5x+h__LV08DzpoJtHBgZGkOKJNJ91pw@mail.gmail.com>
<[email protected]>
<CAMon-aTMgbwC9j-wY8iX5kZ4=KXzCXc-Wpwx3viid8hQ_bJkoQ@mail.gmail.com>
<[email protected]>
<CAMon-aQ0Zs-Otkp1=zk3WYt7Am-_oQHKEmD_rZ1CNGBAgM_jzw@mail.gmail.com>
On 10/29/25 06:40, Colin 't Hart wrote:
> As expected the dump contains:
>
> CREATE TABLE <schema>.<tablename> (
> <other columns>,
> id bigint NOT NULL
> );
>
> <snip>
>
> --
> -- Name: <sequence1>; Type: SEQUENCE; Schema: <schema>; Owner: <owner>
> --
>
> ALTER TABLE <schema>.<tablename> ALTER COLUMN id ADD GENERATED ALWAYS
> AS IDENTITY (
> SEQUENCE NAME <schema>.<sequence1>
> START WITH 1
> INCREMENT BY 1
> NO MINVALUE
> NO MAXVALUE
> CACHE 1
> );
>
>
> --
> -- Name: <sequence2>; Type: SEQUENCE; Schema: <schema>; Owner: <owner>
> --
>
> ALTER TABLE <schema>.<tablename> ALTER COLUMN id ADD GENERATED ALWAYS
> AS IDENTITY (
> SEQUENCE NAME <schema>.<sequence2>
> START WITH 1
> INCREMENT BY 1
> NO MINVALUE
> NO MAXVALUE
> CACHE 1
> );
Just a wild guess. Assuming <schema> is the same, what is the output of:
SELECT
relname,
relnamespace,
relpersistence
FROM
pg_class
WHERE
relname IN ('<sequence1>', '<sequence2> ')
AND relnamespace = '<schema>'::regnamespace;
>
> /Colin
>
--
Adrian Klaver
[email protected]
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