Bit strings are strings of 1's and 0's. They can be used to store or visualize bit masks. There are two SQL bit types: bit(n)

The pg_available_extension_versions view lists the specific extension versions that are available for installation. See also the

Namedroplang -- remove a PostgreSQL procedural language

The catalog pg_largeobject_metadata holds metadata associated with large objects. The actual large object data is stored in

The view pg_policies provides access to useful information about each row-level security policy in the database.

The sslinfo module provides information about the SSL certificate that the current client provided when connecting to

PostgreSQL supports a powerful rule system for the specification of views and ambiguous

NameSET SESSION AUTHORIZATION -- set the session user identifier and the current user identifier of the current session

While the server is running, it is not possible for a malicious user to take the place of the normal database server. However, when the server is down, it is possible for a

This section describes functions that possibly return more than one row. The most widely used functions in this class are series generating functions, as detailed in Table