In this chapter, we will cover the following recipes:
- The PostgreSQL superuser
- Revoking user access to a table
- Granting user access to a table
- Granting user access to specific columns
- Granting user access to specific rows
- Creating a new user
- Temporarily preventing a user from connecting
- Removing a user without dropping their data
- Checking whether all users have a secure password
- Giving limited superuser powers to specific users
- Auditing DDL changes
- Auditing data changes
- Always knowing which user is logged in
- Integrating with LDAP
- Connecting using SSL
- Using SSL certificates to authenticate
- Mapping external usernames to database roles
- Encrypting sensitive data
