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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >Overview</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="System Catalogs" HREF="catalogs.html"><LINK REL="PREVIOUS" TITLE="System Catalogs" HREF="catalogs.html"><LINK REL="NEXT" TITLE="pg_aggregate" HREF="catalog-pg-aggregate.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="SECT1" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="System Catalogs" HREF="catalogs.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="catalogs.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" >Chapter 45. System Catalogs</TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="pg_aggregate" HREF="catalog-pg-aggregate.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="SECT1" ><H1 CLASS="SECT1" ><A NAME="CATALOGS-OVERVIEW" >45.1. Overview</A ></H1 ><P > <A HREF="catalogs-overview.html#CATALOG-TABLE" >Table 45-1</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" ><A NAME="CATALOG-TABLE" ></A ><P ><B >Table 45-1. System Catalogs</B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><THEAD ><TR ><TH >Catalog Name</TH ><TH >Purpose</TH ></TR ></THEAD ><TBODY ><TR ><TD ><A HREF="catalog-pg-aggregate.html" ><TT CLASS="STRUCTNAME" >pg_aggregate</TT ></A ></TD ><TD >aggregate functions</TD ></TR ><TR ><TD ><A HREF="catalog-pg-am.html" ><TT CLASS="STRUCTNAME" >pg_am</TT ></A ></TD ><TD >index access methods</TD ></TR ><TR ><TD ><A HREF="catalog-pg-amop.html" ><TT CLASS="STRUCTNAME" >pg_amop</TT ></A ></TD ><TD >access method operators</TD ></TR ><TR ><TD ><A HREF="catalog-pg-amproc.html" ><TT CLASS="STRUCTNAME" >pg_amproc</TT ></A ></TD ><TD >access method support procedures</TD ></TR ><TR ><TD ><A HREF="catalog-pg-attrdef.html" ><TT CLASS="STRUCTNAME" >pg_attrdef</TT ></A ></TD ><TD >column default values</TD ></TR ><TR ><TD ><A HREF="catalog-pg-attribute.html" ><TT CLASS="STRUCTNAME" >pg_attribute</TT ></A ></TD ><TD >table columns (<SPAN CLASS="QUOTE" >"attributes"</SPAN >)</TD ></TR ><TR ><TD ><A HREF="catalog-pg-authid.html" ><TT CLASS="STRUCTNAME" >pg_authid</TT ></A ></TD ><TD >authorization identifiers (roles)</TD ></TR ><TR ><TD ><A HREF="catalog-pg-auth-members.html" ><TT CLASS="STRUCTNAME" >pg_auth_members</TT ></A ></TD ><TD >authorization identifier membership relationships</TD ></TR ><TR ><TD ><A HREF="catalog-pg-cast.html" ><TT CLASS="STRUCTNAME" >pg_cast</TT ></A ></TD ><TD >casts (data type conversions)</TD ></TR ><TR ><TD ><A HREF="catalog-pg-class.html" ><TT CLASS="STRUCTNAME" >pg_class</TT ></A ></TD ><TD >tables, indexes, sequences, views (<SPAN CLASS="QUOTE" >"relations"</SPAN >)</TD ></TR ><TR ><TD ><A HREF="catalog-pg-constraint.html" ><TT CLASS="STRUCTNAME" >pg_constraint</TT ></A ></TD ><TD >check constraints, unique constraints, primary key constraints, foreign key constraints</TD ></TR ><TR ><TD ><A HREF="catalog-pg-collation.html" ><TT CLASS="STRUCTNAME" >pg_collation</TT ></A ></TD ><TD >collations (locale information)</TD ></TR ><TR ><TD ><A HREF="catalog-pg-conversion.html" ><TT CLASS="STRUCTNAME" >pg_conversion</TT ></A ></TD ><TD >encoding conversion information</TD ></TR ><TR ><TD ><A HREF="catalog-pg-database.html" ><TT CLASS="STRUCTNAME" >pg_database</TT ></A ></TD ><TD >databases within this database cluster</TD ></TR ><TR ><TD ><A HREF="catalog-pg-db-role-setting.html" ><TT CLASS="STRUCTNAME" >pg_db_role_setting</TT ></A ></TD ><TD >per-role and per-database settings</TD ></TR ><TR ><TD ><A HREF="catalog-pg-default-acl.html" ><TT CLASS="STRUCTNAME" >pg_default_acl</TT ></A ></TD ><TD >default privileges for object types</TD ></TR ><TR ><TD ><A HREF="catalog-pg-depend.html" ><TT CLASS="STRUCTNAME" >pg_depend</TT ></A ></TD ><TD >dependencies between database objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-description.html" ><TT CLASS="STRUCTNAME" >pg_description</TT ></A ></TD ><TD >descriptions or comments on database objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-enum.html" ><TT CLASS="STRUCTNAME" >pg_enum</TT ></A ></TD ><TD >enum label and value definitions</TD ></TR ><TR ><TD ><A HREF="catalog-pg-extension.html" ><TT CLASS="STRUCTNAME" >pg_extension</TT ></A ></TD ><TD >installed extensions</TD ></TR ><TR ><TD ><A HREF="catalog-pg-foreign-data-wrapper.html" ><TT CLASS="STRUCTNAME" >pg_foreign_data_wrapper</TT ></A ></TD ><TD >foreign-data wrapper definitions</TD ></TR ><TR ><TD ><A HREF="catalog-pg-foreign-server.html" ><TT CLASS="STRUCTNAME" >pg_foreign_server</TT ></A ></TD ><TD >foreign server definitions</TD ></TR ><TR ><TD ><A HREF="catalog-pg-foreign-table.html" ><TT CLASS="STRUCTNAME" >pg_foreign_table</TT ></A ></TD ><TD >additional foreign table information</TD ></TR ><TR ><TD ><A HREF="catalog-pg-index.html" ><TT CLASS="STRUCTNAME" >pg_index</TT ></A ></TD ><TD >additional index information</TD ></TR ><TR ><TD ><A HREF="catalog-pg-inherits.html" ><TT CLASS="STRUCTNAME" >pg_inherits</TT ></A ></TD ><TD >table inheritance hierarchy</TD ></TR ><TR ><TD ><A HREF="catalog-pg-language.html" ><TT CLASS="STRUCTNAME" >pg_language</TT ></A ></TD ><TD >languages for writing functions</TD ></TR ><TR ><TD ><A HREF="catalog-pg-largeobject.html" ><TT CLASS="STRUCTNAME" >pg_largeobject</TT ></A ></TD ><TD >data pages for large objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-largeobject-metadata.html" ><TT CLASS="STRUCTNAME" >pg_largeobject_metadata</TT ></A ></TD ><TD >metadata for large objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-namespace.html" ><TT CLASS="STRUCTNAME" >pg_namespace</TT ></A ></TD ><TD >schemas</TD ></TR ><TR ><TD ><A HREF="catalog-pg-opclass.html" ><TT CLASS="STRUCTNAME" >pg_opclass</TT ></A ></TD ><TD >access method operator classes</TD ></TR ><TR ><TD ><A HREF="catalog-pg-operator.html" ><TT CLASS="STRUCTNAME" >pg_operator</TT ></A ></TD ><TD >operators</TD ></TR ><TR ><TD ><A HREF="catalog-pg-opfamily.html" ><TT CLASS="STRUCTNAME" >pg_opfamily</TT ></A ></TD ><TD >access method operator families</TD ></TR ><TR ><TD ><A HREF="catalog-pg-pltemplate.html" ><TT CLASS="STRUCTNAME" >pg_pltemplate</TT ></A ></TD ><TD >template data for procedural languages</TD ></TR ><TR ><TD ><A HREF="catalog-pg-proc.html" ><TT CLASS="STRUCTNAME" >pg_proc</TT ></A ></TD ><TD >functions and procedures</TD ></TR ><TR ><TD ><A HREF="catalog-pg-range.html" ><TT CLASS="STRUCTNAME" >pg_range</TT ></A ></TD ><TD >information about range types</TD ></TR ><TR ><TD ><A HREF="catalog-pg-rewrite.html" ><TT CLASS="STRUCTNAME" >pg_rewrite</TT ></A ></TD ><TD >query rewrite rules</TD ></TR ><TR ><TD ><A HREF="catalog-pg-seclabel.html" ><TT CLASS="STRUCTNAME" >pg_seclabel</TT ></A ></TD ><TD >security labels on database objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-shdepend.html" ><TT CLASS="STRUCTNAME" >pg_shdepend</TT ></A ></TD ><TD >dependencies on shared objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-shdescription.html" ><TT CLASS="STRUCTNAME" >pg_shdescription</TT ></A ></TD ><TD >comments on shared objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-shseclabel.html" ><TT CLASS="STRUCTNAME" >pg_shseclabel</TT ></A ></TD ><TD >security labels on shared database objects</TD ></TR ><TR ><TD ><A HREF="catalog-pg-statistic.html" ><TT CLASS="STRUCTNAME" >pg_statistic</TT ></A ></TD ><TD >planner statistics</TD ></TR ><TR ><TD ><A HREF="catalog-pg-tablespace.html" ><TT CLASS="STRUCTNAME" >pg_tablespace</TT ></A ></TD ><TD >tablespaces within this database cluster</TD ></TR ><TR ><TD ><A HREF="catalog-pg-trigger.html" ><TT CLASS="STRUCTNAME" >pg_trigger</TT ></A ></TD ><TD >triggers</TD ></TR ><TR ><TD ><A HREF="catalog-pg-ts-config.html" ><TT CLASS="STRUCTNAME" >pg_ts_config</TT ></A ></TD ><TD >text search configurations</TD ></TR ><TR ><TD ><A HREF="catalog-pg-ts-config-map.html" ><TT CLASS="STRUCTNAME" >pg_ts_config_map</TT ></A ></TD ><TD >text search configurations' token mappings</TD ></TR ><TR ><TD ><A HREF="catalog-pg-ts-dict.html" ><TT CLASS="STRUCTNAME" >pg_ts_dict</TT ></A ></TD ><TD >text search dictionaries</TD ></TR ><TR ><TD ><A HREF="catalog-pg-ts-parser.html" ><TT CLASS="STRUCTNAME" >pg_ts_parser</TT ></A ></TD ><TD >text search parsers</TD ></TR ><TR ><TD ><A HREF="catalog-pg-ts-template.html" ><TT CLASS="STRUCTNAME" >pg_ts_template</TT ></A ></TD ><TD >text search templates</TD ></TR ><TR ><TD ><A HREF="catalog-pg-type.html" ><TT CLASS="STRUCTNAME" >pg_type</TT ></A ></TD ><TD >data types</TD ></TR ><TR ><TD ><A HREF="catalog-pg-user-mapping.html" ><TT CLASS="STRUCTNAME" >pg_user_mapping</TT ></A ></TD ><TD >mappings of users to foreign servers</TD ></TR ></TBODY ></TABLE ></DIV ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="catalogs.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="catalog-pg-aggregate.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >System Catalogs</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="catalogs.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><TT CLASS="STRUCTNAME" >pg_aggregate</TT ></TD ></TR ></TABLE ></DIV ></BODY ></HTML >