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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>53.1. Overview</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="catalogs.html" title="Chapter 53. System Catalogs" /><link rel="next" href="catalog-pg-aggregate.html" title="53.2. pg_aggregate" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">53.1. Overview</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="catalogs.html" title="Chapter 53. System Catalogs">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><th width="60%" align="center">Chapter 53. System Catalogs</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="catalog-pg-aggregate.html" title="53.2. pg_aggregate">Next</a></td></tr></table><hr /></div><div class="sect1" id="CATALOGS-OVERVIEW"><div class="titlepage"><div><div><h2 class="title" style="clear: both">53.1. Overview</h2></div></div></div><p>
+   <a class="xref" href="catalogs-overview.html#CATALOG-TABLE" title="Table 53.1. System Catalogs">Table 53.1</a> lists the system catalogs.
+   More detailed documentation of each catalog follows below.
+  </p><p>
+   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.
+  </p><div class="table" id="CATALOG-TABLE"><p class="title"><strong>Table 53.1. System Catalogs</strong></p><div class="table-contents"><table class="table" summary="System Catalogs" border="1"><colgroup><col /><col /></colgroup><thead><tr><th>Catalog Name</th><th>Purpose</th></tr></thead><tbody><tr><td><a class="link" href="catalog-pg-aggregate.html" title="53.2. pg_aggregate"><code class="structname">pg_aggregate</code></a></td><td>aggregate functions</td></tr><tr><td><a class="link" href="catalog-pg-am.html" title="53.3. pg_am"><code class="structname">pg_am</code></a></td><td>relation access methods</td></tr><tr><td><a class="link" href="catalog-pg-amop.html" title="53.4. pg_amop"><code class="structname">pg_amop</code></a></td><td>access method operators</td></tr><tr><td><a class="link" href="catalog-pg-amproc.html" title="53.5. pg_amproc"><code class="structname">pg_amproc</code></a></td><td>access method support functions</td></tr><tr><td><a class="link" href="catalog-pg-attrdef.html" title="53.6. pg_attrdef"><code class="structname">pg_attrdef</code></a></td><td>column default values</td></tr><tr><td><a class="link" href="catalog-pg-attribute.html" title="53.7. pg_attribute"><code class="structname">pg_attribute</code></a></td><td>table columns (<span class="quote">“<span class="quote">attributes</span>”</span>)</td></tr><tr><td><a class="link" href="catalog-pg-authid.html" title="53.8. pg_authid"><code class="structname">pg_authid</code></a></td><td>authorization identifiers (roles)</td></tr><tr><td><a class="link" href="catalog-pg-auth-members.html" title="53.9. pg_auth_members"><code class="structname">pg_auth_members</code></a></td><td>authorization identifier membership relationships</td></tr><tr><td><a class="link" href="catalog-pg-cast.html" title="53.10. pg_cast"><code class="structname">pg_cast</code></a></td><td>casts (data type conversions)</td></tr><tr><td><a class="link" href="catalog-pg-class.html" title="53.11. pg_class"><code class="structname">pg_class</code></a></td><td>tables, indexes, sequences, views (<span class="quote">“<span class="quote">relations</span>”</span>)</td></tr><tr><td><a class="link" href="catalog-pg-collation.html" title="53.12. pg_collation"><code class="structname">pg_collation</code></a></td><td>collations (locale information)</td></tr><tr><td><a class="link" href="catalog-pg-constraint.html" title="53.13. pg_constraint"><code class="structname">pg_constraint</code></a></td><td>check constraints, unique constraints, primary key constraints, foreign key constraints</td></tr><tr><td><a class="link" href="catalog-pg-conversion.html" title="53.14. pg_conversion"><code class="structname">pg_conversion</code></a></td><td>encoding conversion information</td></tr><tr><td><a class="link" href="catalog-pg-database.html" title="53.15. pg_database"><code class="structname">pg_database</code></a></td><td>databases within this database cluster</td></tr><tr><td><a class="link" href="catalog-pg-db-role-setting.html" title="53.16. pg_db_role_setting"><code class="structname">pg_db_role_setting</code></a></td><td>per-role and per-database settings</td></tr><tr><td><a class="link" href="catalog-pg-default-acl.html" title="53.17. pg_default_acl"><code class="structname">pg_default_acl</code></a></td><td>default privileges for object types</td></tr><tr><td><a class="link" href="catalog-pg-depend.html" title="53.18. pg_depend"><code class="structname">pg_depend</code></a></td><td>dependencies between database objects</td></tr><tr><td><a class="link" href="catalog-pg-description.html" title="53.19. pg_description"><code class="structname">pg_description</code></a></td><td>descriptions or comments on database objects</td></tr><tr><td><a class="link" href="catalog-pg-enum.html" title="53.20. pg_enum"><code class="structname">pg_enum</code></a></td><td>enum label and value definitions</td></tr><tr><td><a class="link" href="catalog-pg-event-trigger.html" title="53.21. pg_event_trigger"><code class="structname">pg_event_trigger</code></a></td><td>event triggers</td></tr><tr><td><a class="link" href="catalog-pg-extension.html" title="53.22. pg_extension"><code class="structname">pg_extension</code></a></td><td>installed extensions</td></tr><tr><td><a class="link" href="catalog-pg-foreign-data-wrapper.html" title="53.23. pg_foreign_data_wrapper"><code class="structname">pg_foreign_data_wrapper</code></a></td><td>foreign-data wrapper definitions</td></tr><tr><td><a class="link" href="catalog-pg-foreign-server.html" title="53.24. pg_foreign_server"><code class="structname">pg_foreign_server</code></a></td><td>foreign server definitions</td></tr><tr><td><a class="link" href="catalog-pg-foreign-table.html" title="53.25. pg_foreign_table"><code class="structname">pg_foreign_table</code></a></td><td>additional foreign table information</td></tr><tr><td><a class="link" href="catalog-pg-index.html" title="53.26. pg_index"><code class="structname">pg_index</code></a></td><td>additional index information</td></tr><tr><td><a class="link" href="catalog-pg-inherits.html" title="53.27. pg_inherits"><code class="structname">pg_inherits</code></a></td><td>table inheritance hierarchy</td></tr><tr><td><a class="link" href="catalog-pg-init-privs.html" title="53.28. pg_init_privs"><code class="structname">pg_init_privs</code></a></td><td>object initial privileges</td></tr><tr><td><a class="link" href="catalog-pg-language.html" title="53.29. pg_language"><code class="structname">pg_language</code></a></td><td>languages for writing functions</td></tr><tr><td><a class="link" href="catalog-pg-largeobject.html" title="53.30. pg_largeobject"><code class="structname">pg_largeobject</code></a></td><td>data pages for large objects</td></tr><tr><td><a class="link" href="catalog-pg-largeobject-metadata.html" title="53.31. pg_largeobject_metadata"><code class="structname">pg_largeobject_metadata</code></a></td><td>metadata for large objects</td></tr><tr><td><a class="link" href="catalog-pg-namespace.html" title="53.32. pg_namespace"><code class="structname">pg_namespace</code></a></td><td>schemas</td></tr><tr><td><a class="link" href="catalog-pg-opclass.html" title="53.33. pg_opclass"><code class="structname">pg_opclass</code></a></td><td>access method operator classes</td></tr><tr><td><a class="link" href="catalog-pg-operator.html" title="53.34. pg_operator"><code class="structname">pg_operator</code></a></td><td>operators</td></tr><tr><td><a class="link" href="catalog-pg-opfamily.html" title="53.35. pg_opfamily"><code class="structname">pg_opfamily</code></a></td><td>access method operator families</td></tr><tr><td><a class="link" href="catalog-pg-parameter-acl.html" title="53.36. pg_parameter_acl"><code class="structname">pg_parameter_acl</code></a></td><td>configuration parameters for which privileges have been granted</td></tr><tr><td><a class="link" href="catalog-pg-partitioned-table.html" title="53.37. pg_partitioned_table"><code class="structname">pg_partitioned_table</code></a></td><td>information about partition key of tables</td></tr><tr><td><a class="link" href="catalog-pg-policy.html" title="53.38. pg_policy"><code class="structname">pg_policy</code></a></td><td>row-security policies</td></tr><tr><td><a class="link" href="catalog-pg-proc.html" title="53.39. pg_proc"><code class="structname">pg_proc</code></a></td><td>functions and procedures</td></tr><tr><td><a class="link" href="catalog-pg-publication.html" title="53.40. pg_publication"><code class="structname">pg_publication</code></a></td><td>publications for logical replication</td></tr><tr><td><a class="link" href="catalog-pg-publication-namespace.html" title="53.41. pg_publication_namespace"><code class="structname">pg_publication_namespace</code></a></td><td>schema to publication mapping</td></tr><tr><td><a class="link" href="catalog-pg-publication-rel.html" title="53.42. pg_publication_rel"><code class="structname">pg_publication_rel</code></a></td><td>relation to publication mapping</td></tr><tr><td><a class="link" href="catalog-pg-range.html" title="53.43. pg_range"><code class="structname">pg_range</code></a></td><td>information about range types</td></tr><tr><td><a class="link" href="catalog-pg-replication-origin.html" title="53.44. pg_replication_origin"><code class="structname">pg_replication_origin</code></a></td><td>registered replication origins</td></tr><tr><td><a class="link" href="catalog-pg-rewrite.html" title="53.45. pg_rewrite"><code class="structname">pg_rewrite</code></a></td><td>query rewrite rules</td></tr><tr><td><a class="link" href="catalog-pg-seclabel.html" title="53.46. pg_seclabel"><code class="structname">pg_seclabel</code></a></td><td>security labels on database objects</td></tr><tr><td><a class="link" href="catalog-pg-sequence.html" title="53.47. pg_sequence"><code class="structname">pg_sequence</code></a></td><td>information about sequences</td></tr><tr><td><a class="link" href="catalog-pg-shdepend.html" title="53.48. pg_shdepend"><code class="structname">pg_shdepend</code></a></td><td>dependencies on shared objects</td></tr><tr><td><a class="link" href="catalog-pg-shdescription.html" title="53.49. pg_shdescription"><code class="structname">pg_shdescription</code></a></td><td>comments on shared objects</td></tr><tr><td><a class="link" href="catalog-pg-shseclabel.html" title="53.50. pg_shseclabel"><code class="structname">pg_shseclabel</code></a></td><td>security labels on shared database objects</td></tr><tr><td><a class="link" href="catalog-pg-statistic.html" title="53.51. pg_statistic"><code class="structname">pg_statistic</code></a></td><td>planner statistics</td></tr><tr><td><a class="link" href="catalog-pg-statistic-ext.html" title="53.52. pg_statistic_ext"><code class="structname">pg_statistic_ext</code></a></td><td>extended planner statistics (definition)</td></tr><tr><td><a class="link" href="catalog-pg-statistic-ext-data.html" title="53.53. pg_statistic_ext_data"><code class="structname">pg_statistic_ext_data</code></a></td><td>extended planner statistics (built statistics)</td></tr><tr><td><a class="link" href="catalog-pg-subscription.html" title="53.54. pg_subscription"><code class="structname">pg_subscription</code></a></td><td>logical replication subscriptions</td></tr><tr><td><a class="link" href="catalog-pg-subscription-rel.html" title="53.55. pg_subscription_rel"><code class="structname">pg_subscription_rel</code></a></td><td>relation state for subscriptions</td></tr><tr><td><a class="link" href="catalog-pg-tablespace.html" title="53.56. pg_tablespace"><code class="structname">pg_tablespace</code></a></td><td>tablespaces within this database cluster</td></tr><tr><td><a class="link" href="catalog-pg-transform.html" title="53.57. pg_transform"><code class="structname">pg_transform</code></a></td><td>transforms (data type to procedural language conversions)</td></tr><tr><td><a class="link" href="catalog-pg-trigger.html" title="53.58. pg_trigger"><code class="structname">pg_trigger</code></a></td><td>triggers</td></tr><tr><td><a class="link" href="catalog-pg-ts-config.html" title="53.59. pg_ts_config"><code class="structname">pg_ts_config</code></a></td><td>text search configurations</td></tr><tr><td><a class="link" href="catalog-pg-ts-config-map.html" title="53.60. pg_ts_config_map"><code class="structname">pg_ts_config_map</code></a></td><td>text search configurations' token mappings</td></tr><tr><td><a class="link" href="catalog-pg-ts-dict.html" title="53.61. pg_ts_dict"><code class="structname">pg_ts_dict</code></a></td><td>text search dictionaries</td></tr><tr><td><a class="link" href="catalog-pg-ts-parser.html" title="53.62. pg_ts_parser"><code class="structname">pg_ts_parser</code></a></td><td>text search parsers</td></tr><tr><td><a class="link" href="catalog-pg-ts-template.html" title="53.63. pg_ts_template"><code class="structname">pg_ts_template</code></a></td><td>text search templates</td></tr><tr><td><a class="link" href="catalog-pg-type.html" title="53.64. pg_type"><code class="structname">pg_type</code></a></td><td>data types</td></tr><tr><td><a class="link" href="catalog-pg-user-mapping.html" title="53.65. pg_user_mapping"><code class="structname">pg_user_mapping</code></a></td><td>mappings of users to foreign servers</td></tr></tbody></table></div></div><br class="table-break" /></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="catalogs.html" title="Chapter 53. System Catalogs">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="catalogs.html" title="Chapter 53. System Catalogs">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="catalog-pg-aggregate.html" title="53.2. pg_aggregate">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 53. System Catalogs </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 53.2. <code class="structname">pg_aggregate</code></td></tr></table></div></body></html>
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