Summary
In this chapter, we learned that PostgreSQL provides a very rich infrastructure for managing permissions associated with roles. Internally, PostgreSQL handles permissions for different database objects by means of ACLs, and every ACL contains information about the set of permissions, the users to whom permissions are granted, and the user who granted such permissions. In terms of tabular data, it is even possible to define column-based permissions and row-level permissions to exclude users from having access to particular subsets of data.
Permissions are granted by nested roles in a dynamically inherited way or on demand, leaving you the option to fine-tune how a role should exploit privileges.
Lastly, when opportunely configured, a server can handle network connections via SSL, thereby encrypting all network traffic and data.
In the next chapter, you will learn all about transactions and how PostgreSQL manages them in a concurrent scenario, providing rock-solid...
