read permissions on all users postgres code example
Example 1: list all permissions on a table in postgres
SELECT grantee, privilege_type
FROM information_schema.role_table_grants
WHERE table_name='mytable'
Example 2: postgresql user permissions to database
sudo -u postgres
psqlpostgres=# create database mydb;
postgres=# create user myuser with encrypted password 'mypass';
postgres=# grant all privileges on database mydb to myuser;