| PostgreSQL 9.1.14 Documentation | ||||
|---|---|---|---|---|
| Prev | Up | Chapter 45. System Catalogs | Next | |
Table 45-1 lists the system catalogs. More detailed documentation of each catalog follows below.
Most system catalogs are copied from the template database during database creation and are thereafter database-specific. A few catalogs are physically shared across all databases in a cluster; these are noted in the descriptions of the individual catalogs.
Table 45-1. System Catalogs
| Catalog Name | Purpose | 
|---|---|
| pg_aggregate | aggregate functions | 
| pg_am | index access methods | 
| pg_amop | access method operators | 
| pg_amproc | access method support procedures | 
| pg_attrdef | column default values | 
| pg_attribute | table columns ("attributes") | 
| pg_authid | authorization identifiers (roles) | 
| pg_auth_members | authorization identifier membership relationships | 
| pg_cast | casts (data type conversions) | 
| pg_class | tables, indexes, sequences, views ("relations") | 
| pg_constraint | check constraints, unique constraints, primary key constraints, foreign key constraints | 
| pg_collation | collations (locale information) | 
| pg_conversion | encoding conversion information | 
| pg_database | databases within this database cluster | 
| pg_db_role_setting | per-role and per-database settings | 
| pg_default_acl | default privileges for object types | 
| pg_depend | dependencies between database objects | 
| pg_description | descriptions or comments on database objects | 
| pg_enum | enum label and value definitions | 
| pg_extension | installed extensions | 
| pg_foreign_data_wrapper | foreign-data wrapper definitions | 
| pg_foreign_server | foreign server definitions | 
| pg_foreign_table | additional foreign table information | 
| pg_index | additional index information | 
| pg_inherits | table inheritance hierarchy | 
| pg_language | languages for writing functions | 
| pg_largeobject | data pages for large objects | 
| pg_largeobject_metadata | metadata for large objects | 
| pg_namespace | schemas | 
| pg_opclass | access method operator classes | 
| pg_operator | operators | 
| pg_opfamily | access method operator families | 
| pg_pltemplate | template data for procedural languages | 
| pg_proc | functions and procedures | 
| pg_rewrite | query rewrite rules | 
| pg_seclabel | security labels on database objects | 
| pg_shdepend | dependencies on shared objects | 
| pg_shdescription | comments on shared objects | 
| pg_statistic | planner statistics | 
| pg_tablespace | tablespaces within this database cluster | 
| pg_trigger | triggers | 
| pg_ts_config | text search configurations | 
| pg_ts_config_map | text search configurations' token mappings | 
| pg_ts_dict | text search dictionaries | 
| pg_ts_parser | text search parsers | 
| pg_ts_template | text search templates | 
| pg_type | data types | 
| pg_user_mapping | mappings of users to foreign servers |