Mark Dilger <[email protected]> writes:
> On Mar 16, 2022, at 11:47 AM, Tom Lane <[email protected]> wrote:
>> ... I therefore judge the
>> hook calls added to ExecSetVariableStmt and AlterSystemSetConfigFile
>> to be 100% useless, in fact probably counterproductive because they
>> introduce a boatload of worries about whether the right things happen
>> if the hook errors out or does something guc.c isn't expecting.
> I think Joshua was planning to use these hooks for security purposes. The
> hooks are supposed to check whether the Oid is valid, and if not, still be
> able to make choices based on the other information. Joshua, any comment on
> this?
It's going to be hard to do anything useful in a hook that (a) does
not know which GUC is being assigned to and (b) cannot do catalog
accesses for fear that we're not inside a transaction. (b), in
particular, seems like a rather thorough API break; up to now
ObjectPostAlter hooks could assume that catalog accesses are OK.
regards, tom lane
