Table of Contents
pg_aggregatepg_ampg_amoppg_amprocpg_attrdefpg_attributepg_authidpg_auth_memberspg_castpg_classpg_collationpg_constraintpg_conversionpg_databasepg_db_role_settingpg_default_aclpg_dependpg_descriptionpg_enumpg_event_triggerpg_extensionpg_foreign_data_wrapperpg_foreign_serverpg_foreign_tablepg_indexpg_inheritspg_init_privspg_languagepg_largeobjectpg_largeobject_metadatapg_namespacepg_opclasspg_operatorpg_opfamilypg_partitioned_tablepg_pltemplatepg_policypg_procpg_publicationpg_publication_relpg_rangepg_replication_originpg_rewritepg_seclabelpg_sequencepg_shdependpg_shdescriptionpg_shseclabelpg_statisticpg_statistic_extpg_statistic_ext_datapg_subscriptionpg_subscription_relpg_tablespacepg_transformpg_triggerpg_ts_configpg_ts_config_mappg_ts_dictpg_ts_parserpg_ts_templatepg_typepg_user_mappingpg_available_extensionspg_available_extension_versionspg_configpg_cursorspg_file_settingspg_grouppg_hba_file_rulespg_indexespg_lockspg_matviewspg_policiespg_prepared_statementspg_prepared_xactspg_publication_tablespg_replication_origin_statuspg_replication_slotspg_rolespg_rulespg_seclabelspg_sequencespg_settingspg_shadowpg_statspg_stats_extpg_tablespg_timezone_abbrevspg_timezone_namespg_userpg_user_mappingspg_views
   The system catalogs are the place where a relational database
   management system stores schema metadata, such as information about
   tables and columns, and internal bookkeeping information.
   PostgreSQL's system catalogs are regular
   tables.  You can drop and recreate the tables, add columns, insert
   and update values, and severely mess up your system that way.
   Normally, one should not change the system catalogs by hand, there
   are normally SQL commands to do that.  (For example, CREATE
   DATABASE inserts a row into the
   pg_database catalog — and actually
   creates the database on disk.)  There are some exceptions for
   particularly esoteric operations, but many of those have been made
   available as SQL commands over time, and so the need for direct manipulation
   of the system catalogs is ever decreasing.