In this post, I am sharing a script for getting the list of objects of a particular User (Owner of the Object) in PostgreSQL.
Generally, PostgreSQL DBAs are using this kind of script for auditing purpose and object tracking purpose.

Using the below script, you can get the list object for a particular user:

I used a ‘postgres’ default user in WHERE condition, which you can edit as per your user.

select 
    nsp.nspname as SchemaName
    ,cls.relname as ObjectName 
    ,rol.rolname as ObjectOwner
    ,case cls.relkind
        when 'r' then 'TABLE'
        when 'm' then 'MATERIALIZED_VIEW'
        when 'i' then 'INDEX'
        when 'S' then 'SEQUENCE'
        when 'v' then 'VIEW'
        when 'c' then 'TYPE'
        else cls.relkind::text
    end as ObjectType
from pg_class cls
join pg_roles rol 
	on rol.oid = cls.relowner
join pg_namespace nsp 
	on nsp.oid = cls.relnamespace
where nsp.nspname not in ('information_schema', 'pg_catalog')
    and nsp.nspname not like 'pg_toast%'
    and rol.rolname = 'postgres'  
order by nsp.nspname, cls.relname

A PostgreSQL Fatal error like role or username does not exist. This is a very common error which is facing by PostgreSQL Users.

Actually, this is happening because of misconfiguration of System username and Database Username.

Most of the Linux users are trying to log in PostgreSQL using root user. But actually, this is wrong.

You will need to become the operating system user under which PostgreSQL was installed to create the first user account.

Generally, the default user name is Postgres and default database is also Postgres.
Once you install PostgreSQL on Linux, you should set the password for the Postgres user which is the default super user of PostgreSQL.

Please do not try to log in with any other default Linux or Unix system user name.

Set password for the default Postgres user:

sudo passwd postgres

Create another role using “postgres”:
Creating new role “dbrnd”. -p = set the password and -d = allow to create database.

sudo -u postgres createuser dbrnd -d -P

PostgreSQL: How to Install PostgreSQL 9.4 on Ubuntu 14.04?

PostgreSQL: How to Install PostgreSQL 9.6 on Ubuntu 16.04?

PostgreSQL is a powerful, open source object-relational database system. It has more than 15 years of active development and a proven architecture that has earned it a strong reputation for reliability, data integrity, and correctness.
 
I am going to share few steps to install PostgreSQL 9.6 on Ubuntu 16.04.

First, check the version of Ubuntu:

lsb_release -sc

sudo add-apt-repository "deb https://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main"

sudo apt-get update
sudo apt-get install postgresql-9.6

ubuntu@:~$ sudo passwd postgres
Enter new UNIX password:****
Retype new UNIX password:****
passwd: password updated successfully

sudo service postgresql start

ubuntu@:~$ su postgres
Password:****

createdb database_name

psql -d database_name

create table Test (rno integer);

\q

exit

Guys, Can you believe that PostgreSQL store it’s postgres super user password into plain text.

Wow, If it is in plain text, it’s very easy to change.

The solution for the windows postgres user is , to change content of pgpass.conf file.

How ?

I read an official document of PostgreSQL and found postgres storing all passwords as a plain text into pgpass.conf.

Now time to search this file in our windows storage directory.

I found this file in :

C:\Document and Settings\..\Application Data\postgresql\pgpass.conf

• You can find your postgres super user password in this file.
• If you find blank file then please write your new password in this file and this password will work for postgres super user

Please note, this password is only for client side location after reset this you can connect your pgadmin tool.