Re: existence of user - Mailing list pgsql-novice

On Saturday 02 February 2002 08:37 pm, Annie Bai wrote:
> Hi Steve,
>
> I tried the command as you did
> %psql -c "select * from pg_user"
>
> but I got an error as 'Database ""select * from pg_user"" does not exist in
> the system catalog. Previous connection kept'.
>
> Need I change some configurations?
>

Hi Annie,

I suspect your PGDATABASE environment variable is not set.


You have two choices (at least)

a) set it :)

b) use the -d flag on psql (to stipulate a database), because
by default I guess it is looking at oe of the template databases.

Oh,

c) both :)


Here are some examples

si@guinness > echo $PGDATABASE
bugdb

si@guinness > psql -c "select * from pg_user"
 usename  | usesysid | usecreatedb | usetrace | usesuper | usecatupd |  passwd  | valuntil
----------+----------+-------------+----------+----------+-----------+----------+----------
 postgres |       26 | t           | t        | t        | t         | ******** |
 si       |       27 | t           | f        | t        | t         | ******** |
 nrg      |       30 | t           | f        | t        | t         | ******** |
 testuser |       28 | t           | f        | t        | t         | ******** |
 sm       |       31 | t           | f        | t        | t         | ******** |
 tc       |       32 | t           | f        | t        | t         | ******** |
 nrgadmin |       33 | t           | f        | t        | t         | ******** |
 dude     |       29 | t           | f        | t        | t         | ******** |
 ken      |       34 | t           | f        | t        | t         | ******** |
(9 rows)


Now if I unset the PGDATABASE...

si@guinness > unset PGDATABASE
si@guinness > echo $PGDATABASE

si@guinness > psql -c "select * from pg_user"
psql: FATAL 1:  Database "testuser" does not exist in the system catalog.

I get what you get.



So I can use the -d flag (for database), with PGDATABASE unset

si@guinness > psql -d bugdb -c "select * from pg_user"
 usename  | usesysid | usecreatedb | usetrace | usesuper | usecatupd |  passwd  | valuntil
----------+----------+-------------+----------+----------+-----------+----------+----------
 postgres |       26 | t           | t        | t        | t         | ******** |
 si       |       27 | t           | f        | t        | t         | ******** |
 nrg      |       30 | t           | f        | t        | t         | ******** |
 testuser |       28 | t           | f        | t        | t         | ******** |
 sm       |       31 | t           | f        | t        | t         | ******** |
 tc       |       32 | t           | f        | t        | t         | ******** |
 nrgadmin |       33 | t           | f        | t        | t         | ******** |
 dude     |       29 | t           | f        | t        | t         | ******** |
 ken      |       34 | t           | f        | t        | t         | ******** |
(9 rows)


Does that make any sense?

s.




> Thanks,
> Annie
>
>
> From: Stephen Ingram <ingram@samsix.com>
>
> >Reply-To: ingram@samsix.com
> >To: "Annie Bai" <annie_job@hotmail.com>, pgsql-novice@postgresql.org
> >Subject: Re: [NOVICE] existence of user
> >Date: Sat, 2 Feb 2002 19:35:27 -0500
> >
> >On Saturday 02 February 2002 07:18 pm, Annie Bai wrote:
> > > Hi,
> > >
> > > After I used 'create user', Is there a database to keep all the
> >
> >information
> >
> > > about users? How can i check the existence of users?
> > >
> > > Thanks,
> > > Yan
> >
> >Hi,
> >
> >Sure. Check out the pg_user table.
> >
> >Postgres 'system' tables all seem to start with 'pg_'
> >
> >si@guinness > psql -c "select * from pg_user"
> >  usename  | usesysid | usecreatedb | usetrace | usesuper | usecatupd |
> >passwd  | valuntil
> >----------+----------+-------------+----------+----------+-----------+----
> >------+---------- postgres |       26 | t           | t        | t
> > | t         | ******** |
> >  si       |       27 | t           | f        | t        | t         |
> >******** |
> >  nrg      |       30 | t           | f        | t        | t         |
> >******** |
> >  testuser |       28 | t           | f        | t        | t         |
> >******** |
> >  sm       |       31 | t           | f        | t        | t         |
> >******** |
> >  tc       |       32 | t           | f        | t        | t         |
> >******** |
> >  nrgadmin |       33 | t           | f        | t        | t         |
> >******** |
> >  dude     |       29 | t           | f        | t        | t         |
> >******** |
> >  ken      |       34 | t           | f        | t        | t         |
> >******** |
> >(9 rows)
> >
> >steve
> >
> > > _________________________________________________________________
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