Hello Adrian,
Thank you for the additional reference links but my concern was less about how to find out what a function (formerly magic constant) that I encountered in the wild did but more about having a list that would educate newcomers/me about what is automatically available for use. For example, in the RLS example from my original message, had I the same or similar need as the poster I would not have been able to formulate the policy that I quoted because I had no clue that SESSION_USER even existed. Specifically I would not have been able to formulate the following clause, "... WITH CHECK (username = SESSION_USER)", w/o first knowing that SESSION_USER was a thing.
Regards,
Dane
On Sat, Jul 11, 2015 at 3:54 PM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
To add to this. In the documentation section:On 07/11/2015 12:21 PM, Raymond O'Donnell wrote:
On 11/07/2015 20:07, Dane Foster wrote:
<snip>
As a recent convert to the Church of Postgres I've been consuming vast
Welcome to the One True Faith! :-)
amounts of information on PostgreSQL, and SESSION_USER is not the first
nor only, what I'm calling magic constant, that I've seen. Off the top
of my head, other examples that I've encountered are CURRENT_USER and
CURRENT_TIMESTAMP.
So my question is this, is there a reference table in the documentation
that I haven't found yet that lists all magic constants and their
meaning? And if not in the official documentation is it in the wiki?
session_user, current_timestamp and current_user are all functions, not
magic constants:
http://www.postgresql.org/docs/9.4/static/functions-datetime.html
http://www.postgresql.org/docs/9.4/static/functions-info.html
I hope this helps,
http://www.postgresql.org/docs/9.4/interactive/index.html
there is a Search box where you can enter the word/phrase you are looking for.
If all else fails there is the Index:
http://www.postgresql.org/docs/9.4/interactive/index.html
Ray.
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
