Table 52.1 lists the system views. More detailed documentation of each catalog follows below. Except where noted, all the views described here are read-only.
Table 52.1. System Views
| View Name | Purpose |
|---|---|
| pg_available_extensions | available extensions |
| pg_available_extension_versions | available versions of extensions |
| pg_backend_memory_contexts | backend memory contexts |
| pg_config | compile-time configuration parameters |
| pg_cursors | open cursors |
| pg_file_settings | summary of configuration file contents |
| pg_group | groups of database users |
| pg_hba_file_rules | summary of client authentication configuration file contents |
| pg_ident_file_mappings | summary of client user name mapping configuration file contents |
| pg_indexes | indexes |
| pg_locks | locks currently held or awaited |
| pg_matviews | materialized views |
| pg_policies | policies |
| pg_prepared_statements | prepared statements |
| pg_prepared_xacts | prepared transactions |
| pg_publication_tables | publications and information of their associated tables |
| pg_replication_origin_status | information about replication origins, including replication progress |
| pg_replication_slots | replication slot information |
| pg_roles | database roles |
| pg_rules | rules |
| pg_seclabels | security labels |
| pg_sequences | sequences |
| pg_settings | parameter settings |
| pg_shadow | database users |
| pg_shmem_allocations | shared memory allocations |
| pg_stats | planner statistics |
| pg_stats_ext | extended planner statistics |
| pg_stats_ext_exprs | extended planner statistics for expressions |
| pg_tables | tables |
| pg_timezone_abbrevs | time zone abbreviations |
| pg_timezone_names | time zone names |
| pg_user | database users |
| pg_user_mappings | user mappings |
| pg_views | views |
| pg_wait_events | wait events |