Re: Adding REPACK [concurrently]

From: Justin Pryzby <pryzby(at)telsasoft(dot)com>
To: Mihail Nikalayeu <mihailnikalayeu(at)gmail(dot)com>
Cc: Antonin Houska <ah(at)cybertec(dot)at>, Andres Freund <andres(at)anarazel(dot)de>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Srinath Reddy Sadipiralla <srinath2133(at)gmail(dot)com>, Matthias van de Meent <boekewurm+postgres(at)gmail(dot)com>, pgsql-hackers(at)lists(dot)postgresql(dot)org, Robert Treat <rob(at)xzilla(dot)net>
Subject: Re: Adding REPACK [concurrently]
Date: 2026-04-17 14:44:12
Message-ID: aeJHPNmL4vVy3oPw@pryzbyj2023
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I had trouble testing this at first:

postgres=# REPACK (CONCURRENTLY) users;
ERROR: 42501: permission denied to use replication slots
DETAIL: Only roles with the REPLICATION attribute may use replication slots.
CONTEXT: REPACK decoding worker
LOCATION: CheckSlotPermissions, slot.c:1697

That's surprising, since it was run as a superuser.

It turns out that repack runs as the owner of the table, and the table
*owner* needs to have REPLICATION -- regardless of who runs the command.

I imagine people have been testing with one user, that both owns the
table and invokes REPACK. Maybe this just needs to be clarified in the
documentation/error message?

--
Justin

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