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Re: getting "shell command argument contains a newline or carriage return:" error with pg_dumpall when db name have new line in double quote

Alvaro Herrera <alvherre@alvh.no-ip.org>

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From: Álvaro Herrera <alvherre@alvh.no-ip.org>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Andrew Dunstan <andrew@dunslane.net>, Mahendra Singh Thalor <mahi6run@gmail.com>, Nathan Bossart <nathandbossart@gmail.com>, Srinath Reddy <srinath2133@gmail.com>, pgsql-hackers@lists.postgresql.org
Date: 2026-02-02T10:54:34Z
Lists: pgsql-hackers 
Hello,

This is not an objection to this patch, but I don't see why we should
allow newlines in tablespace names if we're going to restrict them in
names of roles and databases.  Is it only because pg_dumpall happens not
to dump a comment with the tablespace name on it, like we do for dbs and
roles?  Sounds unprincipled.

I think keeping these things under the same rules makes the most sense.

-- 
Álvaro Herrera        Breisgau, Deutschland  —  https://www.EnterpriseDB.com/
"The problem with the facetime model is not just that it's demoralizing, but
that the people pretending to work interrupt the ones actually working."
                  -- Paul Graham, http://www.paulgraham.com/opensource.html

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. Disallow CR and LF in database, role, and tablespace names

  2. Switch the regression tests of pg_upgrade to use TAP tests