| Postgres-XC 1.2.1 Documentation | ||||
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Note: The following description applies both to Postgres-XC and PostgreSQL if not described explicitly. You can read PostgreSQL as Postgres-XC except for version number, which is specific to each product.
Table 47-1 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 47-1. 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_event_trigger | event triggers |
| 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_range | information about range types |
| 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_shseclabel | security labels on shared database 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 |
| pgxc_class | replication or distribution information of tables (Postgres-XC only) |
| pgxc_node | Postgres-XC cluster nodes (Postgres-XC only) |
| pgxc_group | Postgres-XC cluster node groups (Postgres-XC only) |