Tom Lane <tgl@sss.pgh.pa.us> writes:
> "Joshua D. Drake" <jd@commandprompt.com> writes:
>
>> On 09/17/2015 10:32 AM, Quiroga, Damian wrote:
>>> Is it possible to prevent users from running the version function or
>>> all system information functions? If so, how?
>
>> You could probably revoke access to the function(s) (I haven't tried it
>> because it seems very silly).
>
> I believe revoking public execute access would work, but I concur that
> this specific request seems entirely pointless. Anyone with SQL-level
> access to the server, and a copy of the release notes, can soon determine
> what version they are talking to by testing for the presence or absence of
> assorted features and bugs.
>
> Keep in mind also that pg_dump or pg_upgrade would not preserve such
> alterations to system functions.
And let's not forget...
show server_version or server_version_num;
Oh, and interactive psql without -q prints server version in the banner :-)
>
> regards, tom lane
--
Jerry Sievers
Postgres DBA/Development Consulting
e: postgres.consulting@comcast.net
p: 312.241.7800