From: Zsolt Parragi <zsolt.parragi@percona.com>
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MIME-Version: 1.0
Date: Tue, 2 Jun 2026 14:21:48 -0700
Message-ID: 
 <CAN4CZFM9xXkw8FvHOTan+m4rASSoxbJTWXMbZ_-v2M-84w5Wzg@mail.gmail.com>
Subject: Re: Support EXCEPT for TABLES IN SCHEMA publications
To: pgsql-hackers@lists.postgresql.org
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Hello

In this simple script:

CREATE SCHEMA s;
CREATE TABLE s.a(i int);
CREATE TABLE s.b(i int);
CREATE PUBLICATION p FOR TABLES IN SCHEMA s EXCEPT (TABLE s.b);

SELECT * FROM pg_publication_tables WHERE pubname = 'p';
SELECT * FROM pg_get_publication_tables(ARRAY['p'], 's.b'::regclass);

Shouldn't the second select return an empty list? Currently it returns
one row for s.b.

And I think there's also a bug with CREATE PUBLICATION with IN SCHEMA
CURRENT_SCHEMA:

CREATE SCHEMA s1;
CREATE TABLE s1.a(i int);
CREATE TABLE public.x(i int);
CREATE TABLE public.onlypub(i int);   -- exists only in public, not in s1

CREATE PUBLICATION pn FOR TABLES IN SCHEMA s1 EXCEPT (TABLE public.x);
-- error out, good
SET search_path = s1, public;
CREATE PUBLICATION pn2 FOR TABLES IN SCHEMA s1 EXCEPT (TABLE onlypub);
-- error out, good
SET search_path = s1, public;
SELECT current_schema(); -- s1
CREATE PUBLICATION pc FOR TABLES IN SCHEMA CURRENT_SCHEMA EXCEPT
(TABLE public.x); -- doesn't error out
CREATE PUBLICATION pc4 FOR TABLES IN SCHEMA CURRENT_SCHEMA EXCEPT
(TABLE onlypub); -- also doesn't error out