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Subject: BUG #19516: Mixup of OLD/NEW with RETURNING when parenthesized
Date: Wed, 10 Jun 2026 10:09:51 +0000
Message-ID: <[email protected]> (raw)
The following bug has been logged on the website:
Bug reference: 19516
Logged by: Marko Grujic
Email address: [email protected]
PostgreSQL version: 18.4
Operating system: MacOS, Debian
Description:
Hi, reporting a basic bug which involves a RETURNING clause on DML with
parenthesized OLD/NEW.
Effectively, the (parenthesized) row reference isn't being honored, and
instead the default behavior is applied.
Seeing this on tip of master as well (19beta1).
postgres=# create table t(a int, b text);
CREATE TABLE
postgres=# insert into t values (1, 'one') returning (old).b, old.b,
(new).b, new.b;
b | b | b | b
-----+---+-----+-----
one | | one | one
(1 row)
INSERT 0 1
postgres=# update t set b = '1' where a = 1 returning (old).b, old.b,
(new).b, new.b;
b | b | b | b
---+-----+---+---
1 | one | 1 | 1
(1 row)
UPDATE 1
postgres=# delete from t where a = 1 returning (old).b, old.b, (new).b,
new.b;
b | b | b | b
---+---+---+---
1 | 1 | 1 |
(1 row)
DELETE 1
postgres=# select version();
version
--------------------------------------------------------------------------------------------------------------------
PostgreSQL 18.4 (Debian 18.4-1.pgdg13+1) on x86_64-pc-linux-gnu, compiled
by gcc (Debian 14.2.0-19) 14.2.0, 64-bit
(1 row)
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Subject: Re: BUG #19516: Mixup of OLD/NEW with RETURNING when parenthesized
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