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Re: another idea for changing global configuration settings from SQL

From: Craig Ringer <craig(at)2ndQuadrant(dot)com>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: another idea for changing global configuration settings from SQL
Date: 2012-11-15 23:31:33
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
On 11/16/2012 02:38 AM, Josh Berkus wrote:
>> ApplySetting(InvalidOid, InvalidOid, relsetting, PGC_S_$SOMETHING);
>> in postinit.c, and have some SQL command to modify this setting.
>> The only thing you couldn't handle that way are SIGHUP settings, but the
>> often-cited use cases work_mem, logging, etc. would work.
>> There would also be the advantage that pg_dumpall would save these settings.
> I think this is a great idea.
> One caveat: we really, really, really need a system view which allows
> DBAs to easily review settings defined for specific users and databases.
>  Right now, it requires significant pg_catalog hacking expertise to pull
> out user-specific settings.

A system information function like settings_for_user('username') would
certainly be welcome, showing:

setting_name       setting_value        setting_origin

 Craig Ringer         
 PostgreSQL Development, 24x7 Support, Training & Services

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