The catalog pg_shseclabel stores security labels on shared database objects. Security labels can be manipulated with the

The catalog pg_transform stores information about transforms, which are a mechanism to adapt data types to procedural languages. See

The catalog pg_description stores optional descriptions (comments) for each database object. Descriptions can be manipulated with the

The view pg_seclabels provides information about security labels. It as an easier-to-query version of the

The view pg_config describes the compile-time configuration parameters of the currently installed version of PostgreSQL

The catalog pg_namespace stores namespaces. A namespace is the structure underlying SQL schemas: each namespace can have a separate collection

The catalog pg_foreign_table contains auxiliary information about foreign tables. A foreign table is primarily represented by a

The catalog pg_operator stores information about operators. See CREATE

The catalog pg_largeobject holds the data making up "large objects". A large object is identified by an OID assigned

The view pg_tables provides access to useful information about each table in the database.