BUG #17415: Unable to use underscore as first character in set_config custom parameter

From: PG Bug reporting form <noreply(at)postgresql(dot)org>
To: pgsql-bugs(at)lists(dot)postgresql(dot)org
Cc: danielpolski(at)gmail(dot)com
Subject: BUG #17415: Unable to use underscore as first character in set_config custom parameter
Date: 2022-02-23 08:36:19
Message-ID: 17415-ebdb683d7e09a51c@postgresql.org
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The following bug has been logged on the website:

Bug reference: 17415
Logged by: Daniel Polski
Email address: danielpolski(at)gmail(dot)com
PostgreSQL version: 14.2
Operating system: Linux
Description:

SELECT set_config('_foo.bar', 'foo', FALSE);

ERROR: invalid configuration parameter name "_foo.bar"
DETAIL: Custom parameter names must be two or more simple identifiers
separated by dots.
SQL state: 42602

(Works in 13.5-2)

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