The view pg_locks provides access to information about the locks held by active processes within the database server. See Chapter 13 for more

The catalog pg_trigger stores triggers on tables and views. See CREATE

The catalog pg_pltemplate stores "template" information for procedural languages. A template for a language allows

The pg_replication_origin catalog contains all replication origins created. For more on replication origins see Chapter 48.

The catalog pg_shdescription stores optional descriptions (comments) for shared database objects. Descriptions can be manipulated with the

The catalog pg_foreign_data_wrapper stores foreign-data wrapper definitions. A foreign-data wrapper is the mechanism by which external data

The catalog pg_depend records the dependency relationships between database objects. This information allows DROP

The catalog pg_type stores information about data types. Base types and enum types (scalar types) are created with

The view pg_roles provides access to information about database roles. This is simply a publicly readable view of

The view pg_timezone_abbrevs provides a list of time zone abbreviations that are currently recognized by the datetime input routines. The contents