From: PG Bug reporting form <noreply@postgresql.org>
To: pgsql-bugs@lists.postgresql.org
Cc: andrewbille@gmail.com
Subject: BUG #19074: pg_dump from v18 loses the NOT NULL flag in the inherited table field when dumping v17-databases
Date: Sun, 05 Oct 2025 05:20:21 +0000
Message-ID: <19074-ae2548458cf0195c@postgresql.org> (raw)
The following bug has been logged on the website:
Bug reference: 19074
Logged by: Andrew Bille
Email address: andrewbille@gmail.com
PostgreSQL version: 18.0
Operating system: Ubuntu 20.04
Description:
Hello.
In 17.6, we're creating tables:
CREATE TABLE p (a integer);
CREATE TABLE c () INHERITS (p);
ALTER TABLE ONLY c ALTER COLUMN a SET NOT NULL;
17/bin/pg_dump test returns:
....
CREATE TABLE public.p (
a integer
);
ALTER TABLE public.p OWNER TO andrew;
--
-- Name: c; Type: TABLE; Schema: public; Owner: andrew
--
CREATE TABLE public.c (
)
INHERITS (public.p);
ALTER TABLE ONLY public.c ALTER COLUMN a SET NOT NULL;
....
REL_18_0, REL_18_STABLE, master
master/bin/pg_dump test produces:
...
CREATE TABLE public.p (
a integer
);
ALTER TABLE public.p OWNER TO andrew;
--
-- Name: c; Type: TABLE; Schema: public; Owner: Andrew
--
CREATE TABLE public.c (
)
INHERITS (public.p);
ALTER TABLE public.c OWNER TO andrew;
--
-- Data for Name: c; Type: TABLE DATA; Schema: public; Owner: Andrew
--
COPY public.c (a) FROM stdin;
\.
...
and loses NOT NULL in the inherited table
Regards, Andrew
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: pgsql-bugs@postgresql.org
Cc: noreply@postgresql.org, pgsql-bugs@lists.postgresql.org, andrewbille@gmail.com
Subject: Re: BUG #19074: pg_dump from v18 loses the NOT NULL flag in the inherited table field when dumping v17-databases
In-Reply-To: <19074-ae2548458cf0195c@postgresql.org>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox