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From: Masahiko Sawada <msawada@postgresql.org>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Restrict REPACK (CONCURRENTLY) to the heap access method.
Date: Tue, 08 Sep 2026 18:51:02 +0000
Message-ID: <E1x40uL-000000041sd-1lFc@gemulon.postgresql.org> (raw)

Restrict REPACK (CONCURRENTLY) to the heap access method.

REPACK (CONCURRENTLY) didn't check the table AM of the table being
repacked, so if the table AM doesn't support logical decoding, the
concurrent changes are never decoded and are silently lost from the
rewritten table.

Fix by erroring out for tables that use a non-heap access method.

Reported-by: Nathan Bossart <nathandbossart@gmail.com>
Author: Bharath Rupireddy <bharath.rupireddyforpostgres@gmail.com>
Reviewed-by: Nathan Bossart <nathandbossart@gmail.com>
Reviewed-by: Masahiko Sawada <sawada.mshk@gmail.com>
Discussion: https://postgr.es/m/apBkixO4xAGFoiT3@nathan
Backpatch-through: 19

Branch
------
REL_19_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/fe7b60723420c5279824c35efc45630889239a70

Modified Files
--------------
doc/src/sgml/ref/repack.sgml  |  6 ++++++
src/backend/commands/repack.c | 14 ++++++++++++++
2 files changed, 20 insertions(+)



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