Hi,

Basically the case was, when session_user != current_user then command 
\password failed with error message “ERROR:  permission denied”. All was good 
when session_user == current_user.

In terms of statement “session_user user was set as the owner of the database 
automatically” - I have a setup where session_user is changed automatically as 
database owner when user logs into database.

BR,
Toomas

> On 20. Oct 2021, at 18:43, Vijaykumar Jain <vijaykumarjain.git...@gmail.com> 
> wrote:
> 
> 
> 
> On Wed, 20 Oct 2021 at 20:52, Adrian Klaver <adrian.kla...@aklaver.com 
> <mailto:adrian.kla...@aklaver.com>> wrote:
> On 10/20/21 08:07, Toomas wrote:
> > Hi Adrian,
> > 
> > Thank you for your help. The issue was that when user logged into database 
> > his session_user user was set as owner of database automatically. User had 
> > success to change password when session_user = current_user was set before.
> 
> I'm not understanding. You will need to sketch this out:
> 
> 1) Connection parameters for log in with <user_name>.
> 
> 2) On log in the output from: select session_user, current_user;
> 
> 3) Define '...set as owner of database automatically'.
> 
> 
> Toomas, 
> things work for me as expected. 
> 
> I guess as asked, you may want to show an example for your below statement to 
> help understand better.
> "The issue was that when a user logged into the database his session_user 
> user was set as the owner of the database automatically."
> 
> 
> postgres@u1:~$ psql
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> Type "help" for help.
> 
> postgres=# \du
>                                    List of roles
>  Role name |                         Attributes                         | 
> Member of
> -----------+------------------------------------------------------------+-----------
>  postgres  | Superuser, Create role, Create DB, Replication, Bypass RLS | {}
> 
> postgres=# create role vijay login nosuperuser password '1234';
> CREATE ROLE
> postgres=# grant CONNECT on database postgres to vijay;
> GRANT
> postgres=# \q
> postgres@u1:~$ psql -U vijay -p 5432 -d postgres -h 127.0.0.1
> Password for user vijay:
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, 
> compression: off)
> Type "help" for help.
> 
> postgres=> \password
> Enter new password:
> Enter it again:
> postgres=> \q
> postgres@u1:~$ psql -U vijay -p 5432 -d postgres -h 127.0.0.1  # old password
> Password for user vijay:
> psql: error: FATAL:  password authentication failed for user "vijay"
> FATAL:  password authentication failed for user "vijay"
> postgres@u1:~$ psql -U vijay -p 5432 -d postgres -h 127.0.0.1 # new password
> Password for user vijay:
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, 
> compression: off)
> Type "help" for help.
> 
> postgres=> \q
>  
> postgres@u1:~$ psql -U vijay -p 5432 -d postgres -h 127.0.0.1
> Password for user vijay:
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, 
> compression: off)
> Type "help" for help.
> 
> postgres=> select session_user, current_user;
>  session_user | current_user
> --------------+--------------
>  vijay        | vijay
> (1 row)
> 
> postgres=> \password
> Enter new password:
> Enter it again:
> postgres=> alter role vijay password '666'; -- trying both ways, works
> ALTER ROLE
> postgres=> \q
> postgres@u1:~$ psql -U vijay -p 5432 -d postgres -h 127.0.0.1
> Password for user vijay:
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, 
> compression: off)
> Type "help" for help.
> 
> postgres=> select session_user, current_user;
>  session_user | current_user
> --------------+--------------
>  vijay        | vijay
> (1 row)
> 
> 
> postgres@u1:~$ psql
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> Type "help" for help.
> 
> postgres=# create database vijay owner vijay;
> CREATE DATABASE
> postgres=# \q
> postgres@u1:~$ psql -U vijay -p 5432 -d vijay -h 127.0.0.1
> Password for user vijay:
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, 
> compression: off)
> Type "help" for help.
> 
> vijay=> select session_user, current_user;
>  session_user | current_user
> --------------+--------------
>  vijay        | vijay
> (1 row)
> 
> vijay=> alter role vijay password '999'; -- trying both ways, works
> ALTER ROLE
> vijay=> \q
> postgres@u1:~$ psql -U vijay -p 5432 -d vijay -h 127.0.0.1
> Password for user vijay:
> psql (12.8 (Ubuntu 12.8-0ubuntu0.20.04.1))
> SSL connection (protocol: TLSv1.3, cipher: TLS_AES_256_GCM_SHA384, bits: 256, 
> compression: off)
> Type "help" for help.
> 
> vijay=> \q

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