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From: Mark Dilger <[email protected]>
To: Tom Lane <[email protected]>
Cc: Andrew Dunstan <[email protected]>
Cc: Robert Haas <[email protected]>
Cc: PostgreSQL-development <[email protected]>
Subject: Re: Granting SET and ALTER SYSTE privileges for GUCs
Date: Tue, 16 Nov 2021 14:25:12 -0800
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
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> On Nov 16, 2021, at 2:12 PM, Tom Lane <[email protected]> wrote:
> 
> The question is why you need pg_config_param at all, then.
> AFAICS it just adds maintenance complexity we could do without.
> I think we'd be better off with a catalog modeled on the design of
> pg_db_role_setting, which would have entries for roles and lists
> of GUC names that those roles could set.

Originally, I was trying to have dependency linkage between two proper types of objects, so that DROP ROLE and DROP CONFIGURATION PARAMETER would behave as expected, complaining about privileges remaining rather than dropping an object and leaving a dangling reference.

I've deleted the whole CREATE CONFIGURATION PARAMETER and DROP CONFIGURATION PARAMETER syntax and implementation, but it still seems odd to me that:

  CREATE ROLE somebody;
  GRANT SELECT ON TABLE sometable TO ROLE somebody;
  GRANT ALTER SYSTEM ON someguc TO ROLE somebody;
  DROP ROLE somebody;
  ERROR:  role "somebody" cannot be dropped because some objects depend on it
  DETAIL:  privileges for table sometable

would not mention privileges for "someguc" as well.  That's why I want configuration parameters to be proper objects with OIDs and with entries in pg_depend and/or pg_shdepend.  Maybe there is some better way to do it, but that's why I've been doing this.

—
Mark Dilger
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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