Message-ID: <61b835f49966b7f5853cf89de96fdc5f51f03a18.camel@cybertec.at>
Subject: Re: Reducing the log spam
From: Laurenz Albe <laurenz.albe@cybertec.at>
To: Isaac Morland <isaac.morland@gmail.com>
Cc: pgsql-hackers@lists.postgresql.org
Date: Thu, 07 Mar 2024 08:30:59 +0100
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References: <408f399e7de1416c47bab7e260327ed5ad92838c.camel@cybertec.at>
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On Wed, 2024-03-06 at 17:33 -0500, Isaac Morland wrote:
> I have two questions about this:
>=20
> First, can it be done per role? If I have a particular application which =
is
> constantly throwing some particular error, I might want to suppress it, b=
ut
> not suppress the same error occasionally coming from another application.
> I see=C2=A0ALTER DATABASE name SET configuration_parameter =E2=80=A6 as b=
eing useful here,
> but often multiple applications share a database.
>
> Second, where can this setting be adjusted? Can any session turn off logg=
ing
> of arbitrary sets of sqlstates resulting from its queries? It feels to me
> like that might allow security problems to be hidden. Specifically, the f=
irst
> thing an SQL injection might do would be to turn off logging of important
> error states, then proceed to try various nefarious things.

I was envisioning the parameter to be like other logging parameters, for
example "log_statement":  only superusers can set the parameter or GRANT
that privilege to others.  Also, a superuser could use ALTER ROLE to set
the parameter for all sessions by that role.

> It seems to me the above questions interact; an answer to the first might=
 be
> "ALTER ROLE role_specification SET configuration_parameter", but I think =
that
> would allow roles to change their own settings,=C2=A0contrary to the conc=
ern
> raised by the second question.

If a superuser sets "log_statement" on a role, that role cannot undo or cha=
nge
the setting.  That's just how I plan to implement the new parameter.

Yours,
Laurenz Albe