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Subject: BUG #19519: REPACK can fail due to missing chunk for toast value
To: pgsql-bugs@lists.postgresql.org
From: PG Bug reporting form <noreply@postgresql.org>
Cc: exclusion@gmail.com
Reply-To: exclusion@gmail.com, pgsql-bugs@lists.postgresql.org
Date: Sun, 14 Jun 2026 07:00:01 +0000
Message-ID: <19519-fe02d8ff679d834d@postgresql.org>
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 <https://www.postgresql.org/message-id/19519-fe02d8ff679d834d%40postgresql.org>
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The following bug has been logged on the website:

Bug reference:      19519
Logged by:          Alexander Lakhin
Email address:      exclusion@gmail.com
PostgreSQL version: 19beta1
Operating system:   Ubuntu 24.04
Description:       =20

The following script:
createdb db1
createdb db2

cat << EOF | psql db1
SET default_statistics_target =3D 1000;
CREATE TABLE t(i int, t text);
INSERT INTO t SELECT 1, g::text FROM generate_series(1, 50000) g;
ANALYZE t;
EOF

cat << EOF | psql db2 &
BEGIN;
CREATE TABLE t(i int);
SELECT pg_sleep(3);
EOF

sleep 1

cat << EOF | psql db1
DROP TABLE t;
VACUUM pg_toast.pg_toast_2619;
REPACK;
EOF
wait

triggers:
ERROR:  missing chunk number 0 for toast value 16393 in pg_toast_2619

Reproduced starting from ac58465e0.