Re: another idea for changing global configuration settings from SQL

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 http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services