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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>Part VI. Reference</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="archive-module-callbacks.html" title="51.2. Archive Module Callbacks" /><link rel="next" href="sql-commands.html" title="SQL Commands" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">Part VI. Reference</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="archive-module-callbacks.html" title="51.2. Archive Module Callbacks">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="index.html" title="PostgreSQL 15.5 Documentation">Up</a></td><th width="60%" align="center">PostgreSQL 15.5 Documentation</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="sql-commands.html" title="SQL Commands">Next</a></td></tr></table><hr /></div><div class="part" id="REFERENCE"><div class="titlepage"><div><div><h1 class="title">Part VI. Reference</h1></div></div></div><div class="partintro" id="id-1.9.2"><div></div><p>
   The entries in this Reference are meant to provide in reasonable
   length an authoritative, complete, and formal summary about their
   respective subjects.  More information about the use of
   <span class="productname">PostgreSQL</span>, in narrative, tutorial, or
   example form, can be found in other parts of this book.  See the
   cross-references listed on each reference page.
  </p><p>
   The reference entries are also available as traditional
   <span class="quote">“<span class="quote">man</span>”</span> pages.
  </p><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="reference"><a href="sql-commands.html">I. SQL Commands</a></span></dt><dd><dl><dt><span class="refentrytitle"><a href="sql-abort.html">ABORT</a></span><span class="refpurpose"> — abort the current transaction</span></dt><dt><span class="refentrytitle"><a href="sql-alteraggregate.html">ALTER AGGREGATE</a></span><span class="refpurpose"> — change the definition of an aggregate function</span></dt><dt><span class="refentrytitle"><a href="sql-altercollation.html">ALTER COLLATION</a></span><span class="refpurpose"> — change the definition of a collation</span></dt><dt><span class="refentrytitle"><a href="sql-alterconversion.html">ALTER CONVERSION</a></span><span class="refpurpose"> — change the definition of a conversion</span></dt><dt><span class="refentrytitle"><a href="sql-alterdatabase.html">ALTER DATABASE</a></span><span class="refpurpose"> — change a database</span></dt><dt><span class="refentrytitle"><a href="sql-alterdefaultprivileges.html">ALTER DEFAULT PRIVILEGES</a></span><span class="refpurpose"> — define default access privileges</span></dt><dt><span class="refentrytitle"><a href="sql-alterdomain.html">ALTER DOMAIN</a></span><span class="refpurpose"> — 
   change the definition of a domain
  </span></dt><dt><span class="refentrytitle"><a href="sql-altereventtrigger.html">ALTER EVENT TRIGGER</a></span><span class="refpurpose"> — change the definition of an event trigger</span></dt><dt><span class="refentrytitle"><a href="sql-alterextension.html">ALTER EXTENSION</a></span><span class="refpurpose"> — 
   change the definition of an extension
  </span></dt><dt><span class="refentrytitle"><a href="sql-alterforeigndatawrapper.html">ALTER FOREIGN DATA WRAPPER</a></span><span class="refpurpose"> — change the definition of a foreign-data wrapper</span></dt><dt><span class="refentrytitle"><a href="sql-alterforeigntable.html">ALTER FOREIGN TABLE</a></span><span class="refpurpose"> — change the definition of a foreign table</span></dt><dt><span class="refentrytitle"><a href="sql-alterfunction.html">ALTER FUNCTION</a></span><span class="refpurpose"> — change the definition of a function</span></dt><dt><span class="refentrytitle"><a href="sql-altergroup.html">ALTER GROUP</a></span><span class="refpurpose"> — change role name or membership</span></dt><dt><span class="refentrytitle"><a href="sql-alterindex.html">ALTER INDEX</a></span><span class="refpurpose"> — change the definition of an index</span></dt><dt><span class="refentrytitle"><a href="sql-alterlanguage.html">ALTER LANGUAGE</a></span><span class="refpurpose"> — change the definition of a procedural language</span></dt><dt><span class="refentrytitle"><a href="sql-alterlargeobject.html">ALTER LARGE OBJECT</a></span><span class="refpurpose"> — change the definition of a large object</span></dt><dt><span class="refentrytitle"><a href="sql-altermaterializedview.html">ALTER MATERIALIZED VIEW</a></span><span class="refpurpose"> — change the definition of a materialized view</span></dt><dt><span class="refentrytitle"><a href="sql-alteroperator.html">ALTER OPERATOR</a></span><span class="refpurpose"> — change the definition of an operator</span></dt><dt><span class="refentrytitle"><a href="sql-alteropclass.html">ALTER OPERATOR CLASS</a></span><span class="refpurpose"> — change the definition of an operator class</span></dt><dt><span class="refentrytitle"><a href="sql-alteropfamily.html">ALTER OPERATOR FAMILY</a></span><span class="refpurpose"> — change the definition of an operator family</span></dt><dt><span class="refentrytitle"><a href="sql-alterpolicy.html">ALTER POLICY</a></span><span class="refpurpose"> — change the definition of a row-level security policy</span></dt><dt><span class="refentrytitle"><a href="sql-alterprocedure.html">ALTER PROCEDURE</a></span><span class="refpurpose"> — change the definition of a procedure</span></dt><dt><span class="refentrytitle"><a href="sql-alterpublication.html">ALTER PUBLICATION</a></span><span class="refpurpose"> — change the definition of a publication</span></dt><dt><span class="refentrytitle"><a href="sql-alterrole.html">ALTER ROLE</a></span><span class="refpurpose"> — change a database role</span></dt><dt><span class="refentrytitle"><a href="sql-alterroutine.html">ALTER ROUTINE</a></span><span class="refpurpose"> — change the definition of a routine</span></dt><dt><span class="refentrytitle"><a href="sql-alterrule.html">ALTER RULE</a></span><span class="refpurpose"> — change the definition of a rule</span></dt><dt><span class="refentrytitle"><a href="sql-alterschema.html">ALTER SCHEMA</a></span><span class="refpurpose"> — change the definition of a schema</span></dt><dt><span class="refentrytitle"><a href="sql-altersequence.html">ALTER SEQUENCE</a></span><span class="refpurpose"> — 
   change the definition of a sequence generator
  </span></dt><dt><span class="refentrytitle"><a href="sql-alterserver.html">ALTER SERVER</a></span><span class="refpurpose"> — change the definition of a foreign server</span></dt><dt><span class="refentrytitle"><a href="sql-alterstatistics.html">ALTER STATISTICS</a></span><span class="refpurpose"> — 
   change the definition of an extended statistics object
  </span></dt><dt><span class="refentrytitle"><a href="sql-altersubscription.html">ALTER SUBSCRIPTION</a></span><span class="refpurpose"> — change the definition of a subscription</span></dt><dt><span class="refentrytitle"><a href="sql-altersystem.html">ALTER SYSTEM</a></span><span class="refpurpose"> — change a server configuration parameter</span></dt><dt><span class="refentrytitle"><a href="sql-altertable.html">ALTER TABLE</a></span><span class="refpurpose"> — change the definition of a table</span></dt><dt><span class="refentrytitle"><a href="sql-altertablespace.html">ALTER TABLESPACE</a></span><span class="refpurpose"> — change the definition of a tablespace</span></dt><dt><span class="refentrytitle"><a href="sql-altertsconfig.html">ALTER TEXT SEARCH CONFIGURATION</a></span><span class="refpurpose"> — change the definition of a text search configuration</span></dt><dt><span class="refentrytitle"><a href="sql-altertsdictionary.html">ALTER TEXT SEARCH DICTIONARY</a></span><span class="refpurpose"> — change the definition of a text search dictionary</span></dt><dt><span class="refentrytitle"><a href="sql-altertsparser.html">ALTER TEXT SEARCH PARSER</a></span><span class="refpurpose"> — change the definition of a text search parser</span></dt><dt><span class="refentrytitle"><a href="sql-altertstemplate.html">ALTER TEXT SEARCH TEMPLATE</a></span><span class="refpurpose"> — change the definition of a text search template</span></dt><dt><span class="refentrytitle"><a href="sql-altertrigger.html">ALTER TRIGGER</a></span><span class="refpurpose"> — change the definition of a trigger</span></dt><dt><span class="refentrytitle"><a href="sql-altertype.html">ALTER TYPE</a></span><span class="refpurpose"> — 
   change the definition of a type
  </span></dt><dt><span class="refentrytitle"><a href="sql-alteruser.html">ALTER USER</a></span><span class="refpurpose"> — change a database role</span></dt><dt><span class="refentrytitle"><a href="sql-alterusermapping.html">ALTER USER MAPPING</a></span><span class="refpurpose"> — change the definition of a user mapping</span></dt><dt><span class="refentrytitle"><a href="sql-alterview.html">ALTER VIEW</a></span><span class="refpurpose"> — change the definition of a view</span></dt><dt><span class="refentrytitle"><a href="sql-analyze.html">ANALYZE</a></span><span class="refpurpose"> — collect statistics about a database</span></dt><dt><span class="refentrytitle"><a href="sql-begin.html">BEGIN</a></span><span class="refpurpose"> — start a transaction block</span></dt><dt><span class="refentrytitle"><a href="sql-call.html">CALL</a></span><span class="refpurpose"> — invoke a procedure</span></dt><dt><span class="refentrytitle"><a href="sql-checkpoint.html">CHECKPOINT</a></span><span class="refpurpose"> — force a write-ahead log checkpoint</span></dt><dt><span class="refentrytitle"><a href="sql-close.html">CLOSE</a></span><span class="refpurpose"> — close a cursor</span></dt><dt><span class="refentrytitle"><a href="sql-cluster.html">CLUSTER</a></span><span class="refpurpose"> — cluster a table according to an index</span></dt><dt><span class="refentrytitle"><a href="sql-comment.html">COMMENT</a></span><span class="refpurpose"> — define or change the comment of an object</span></dt><dt><span class="refentrytitle"><a href="sql-commit.html">COMMIT</a></span><span class="refpurpose"> — commit the current transaction</span></dt><dt><span class="refentrytitle"><a href="sql-commit-prepared.html">COMMIT PREPARED</a></span><span class="refpurpose"> — commit a transaction that was earlier prepared for two-phase commit</span></dt><dt><span class="refentrytitle"><a href="sql-copy.html">COPY</a></span><span class="refpurpose"> — copy data between a file and a table</span></dt><dt><span class="refentrytitle"><a href="sql-create-access-method.html">CREATE ACCESS METHOD</a></span><span class="refpurpose"> — define a new access method</span></dt><dt><span class="refentrytitle"><a href="sql-createaggregate.html">CREATE AGGREGATE</a></span><span class="refpurpose"> — define a new aggregate function</span></dt><dt><span class="refentrytitle"><a href="sql-createcast.html">CREATE CAST</a></span><span class="refpurpose"> — define a new cast</span></dt><dt><span class="refentrytitle"><a href="sql-createcollation.html">CREATE COLLATION</a></span><span class="refpurpose"> — define a new collation</span></dt><dt><span class="refentrytitle"><a href="sql-createconversion.html">CREATE CONVERSION</a></span><span class="refpurpose"> — define a new encoding conversion</span></dt><dt><span class="refentrytitle"><a href="sql-createdatabase.html">CREATE DATABASE</a></span><span class="refpurpose"> — create a new database</span></dt><dt><span class="refentrytitle"><a href="sql-createdomain.html">CREATE DOMAIN</a></span><span class="refpurpose"> — define a new domain</span></dt><dt><span class="refentrytitle"><a href="sql-createeventtrigger.html">CREATE EVENT TRIGGER</a></span><span class="refpurpose"> — define a new event trigger</span></dt><dt><span class="refentrytitle"><a href="sql-createextension.html">CREATE EXTENSION</a></span><span class="refpurpose"> — install an extension</span></dt><dt><span class="refentrytitle"><a href="sql-createforeigndatawrapper.html">CREATE FOREIGN DATA WRAPPER</a></span><span class="refpurpose"> — define a new foreign-data wrapper</span></dt><dt><span class="refentrytitle"><a href="sql-createforeigntable.html">CREATE FOREIGN TABLE</a></span><span class="refpurpose"> — define a new foreign table</span></dt><dt><span class="refentrytitle"><a href="sql-createfunction.html">CREATE FUNCTION</a></span><span class="refpurpose"> — define a new function</span></dt><dt><span class="refentrytitle"><a href="sql-creategroup.html">CREATE GROUP</a></span><span class="refpurpose"> — define a new database role</span></dt><dt><span class="refentrytitle"><a href="sql-createindex.html">CREATE INDEX</a></span><span class="refpurpose"> — define a new index</span></dt><dt><span class="refentrytitle"><a href="sql-createlanguage.html">CREATE LANGUAGE</a></span><span class="refpurpose"> — define a new procedural language</span></dt><dt><span class="refentrytitle"><a href="sql-creatematerializedview.html">CREATE MATERIALIZED VIEW</a></span><span class="refpurpose"> — define a new materialized view</span></dt><dt><span class="refentrytitle"><a href="sql-createoperator.html">CREATE OPERATOR</a></span><span class="refpurpose"> — define a new operator</span></dt><dt><span class="refentrytitle"><a href="sql-createopclass.html">CREATE OPERATOR CLASS</a></span><span class="refpurpose"> — define a new operator class</span></dt><dt><span class="refentrytitle"><a href="sql-createopfamily.html">CREATE OPERATOR FAMILY</a></span><span class="refpurpose"> — define a new operator family</span></dt><dt><span class="refentrytitle"><a href="sql-createpolicy.html">CREATE POLICY</a></span><span class="refpurpose"> — define a new row-level security policy for a table</span></dt><dt><span class="refentrytitle"><a href="sql-createprocedure.html">CREATE PROCEDURE</a></span><span class="refpurpose"> — define a new procedure</span></dt><dt><span class="refentrytitle"><a href="sql-createpublication.html">CREATE PUBLICATION</a></span><span class="refpurpose"> — define a new publication</span></dt><dt><span class="refentrytitle"><a href="sql-createrole.html">CREATE ROLE</a></span><span class="refpurpose"> — define a new database role</span></dt><dt><span class="refentrytitle"><a href="sql-createrule.html">CREATE RULE</a></span><span class="refpurpose"> — define a new rewrite rule</span></dt><dt><span class="refentrytitle"><a href="sql-createschema.html">CREATE SCHEMA</a></span><span class="refpurpose"> — define a new schema</span></dt><dt><span class="refentrytitle"><a href="sql-createsequence.html">CREATE SEQUENCE</a></span><span class="refpurpose"> — define a new sequence generator</span></dt><dt><span class="refentrytitle"><a href="sql-createserver.html">CREATE SERVER</a></span><span class="refpurpose"> — define a new foreign server</span></dt><dt><span class="refentrytitle"><a href="sql-createstatistics.html">CREATE STATISTICS</a></span><span class="refpurpose"> — define extended statistics</span></dt><dt><span class="refentrytitle"><a href="sql-createsubscription.html">CREATE SUBSCRIPTION</a></span><span class="refpurpose"> — define a new subscription</span></dt><dt><span class="refentrytitle"><a href="sql-createtable.html">CREATE TABLE</a></span><span class="refpurpose"> — define a new table</span></dt><dt><span class="refentrytitle"><a href="sql-createtableas.html">CREATE TABLE AS</a></span><span class="refpurpose"> — define a new table from the results of a query</span></dt><dt><span class="refentrytitle"><a href="sql-createtablespace.html">CREATE TABLESPACE</a></span><span class="refpurpose"> — define a new tablespace</span></dt><dt><span class="refentrytitle"><a href="sql-createtsconfig.html">CREATE TEXT SEARCH CONFIGURATION</a></span><span class="refpurpose"> — define a new text search configuration</span></dt><dt><span class="refentrytitle"><a href="sql-createtsdictionary.html">CREATE TEXT SEARCH DICTIONARY</a></span><span class="refpurpose"> — define a new text search dictionary</span></dt><dt><span class="refentrytitle"><a href="sql-createtsparser.html">CREATE TEXT SEARCH PARSER</a></span><span class="refpurpose"> — define a new text search parser</span></dt><dt><span class="refentrytitle"><a href="sql-createtstemplate.html">CREATE TEXT SEARCH TEMPLATE</a></span><span class="refpurpose"> — define a new text search template</span></dt><dt><span class="refentrytitle"><a href="sql-createtransform.html">CREATE TRANSFORM</a></span><span class="refpurpose"> — define a new transform</span></dt><dt><span class="refentrytitle"><a href="sql-createtrigger.html">CREATE TRIGGER</a></span><span class="refpurpose"> — define a new trigger</span></dt><dt><span class="refentrytitle"><a href="sql-createtype.html">CREATE TYPE</a></span><span class="refpurpose"> — define a new data type</span></dt><dt><span class="refentrytitle"><a href="sql-createuser.html">CREATE USER</a></span><span class="refpurpose"> — define a new database role</span></dt><dt><span class="refentrytitle"><a href="sql-createusermapping.html">CREATE USER MAPPING</a></span><span class="refpurpose"> — define a new mapping of a user to a foreign server</span></dt><dt><span class="refentrytitle"><a href="sql-createview.html">CREATE VIEW</a></span><span class="refpurpose"> — define a new view</span></dt><dt><span class="refentrytitle"><a href="sql-deallocate.html">DEALLOCATE</a></span><span class="refpurpose"> — deallocate a prepared statement</span></dt><dt><span class="refentrytitle"><a href="sql-declare.html">DECLARE</a></span><span class="refpurpose"> — define a cursor</span></dt><dt><span class="refentrytitle"><a href="sql-delete.html">DELETE</a></span><span class="refpurpose"> — delete rows of a table</span></dt><dt><span class="refentrytitle"><a href="sql-discard.html">DISCARD</a></span><span class="refpurpose"> — discard session state</span></dt><dt><span class="refentrytitle"><a href="sql-do.html">DO</a></span><span class="refpurpose"> — execute an anonymous code block</span></dt><dt><span class="refentrytitle"><a href="sql-drop-access-method.html">DROP ACCESS METHOD</a></span><span class="refpurpose"> — remove an access method</span></dt><dt><span class="refentrytitle"><a href="sql-dropaggregate.html">DROP AGGREGATE</a></span><span class="refpurpose"> — remove an aggregate function</span></dt><dt><span class="refentrytitle"><a href="sql-dropcast.html">DROP CAST</a></span><span class="refpurpose"> — remove a cast</span></dt><dt><span class="refentrytitle"><a href="sql-dropcollation.html">DROP COLLATION</a></span><span class="refpurpose"> — remove a collation</span></dt><dt><span class="refentrytitle"><a href="sql-dropconversion.html">DROP CONVERSION</a></span><span class="refpurpose"> — remove a conversion</span></dt><dt><span class="refentrytitle"><a href="sql-dropdatabase.html">DROP DATABASE</a></span><span class="refpurpose"> — remove a database</span></dt><dt><span class="refentrytitle"><a href="sql-dropdomain.html">DROP DOMAIN</a></span><span class="refpurpose"> — remove a domain</span></dt><dt><span class="refentrytitle"><a href="sql-dropeventtrigger.html">DROP EVENT TRIGGER</a></span><span class="refpurpose"> — remove an event trigger</span></dt><dt><span class="refentrytitle"><a href="sql-dropextension.html">DROP EXTENSION</a></span><span class="refpurpose"> — remove an extension</span></dt><dt><span class="refentrytitle"><a href="sql-dropforeigndatawrapper.html">DROP FOREIGN DATA WRAPPER</a></span><span class="refpurpose"> — remove a foreign-data wrapper</span></dt><dt><span class="refentrytitle"><a href="sql-dropforeigntable.html">DROP FOREIGN TABLE</a></span><span class="refpurpose"> — remove a foreign table</span></dt><dt><span class="refentrytitle"><a href="sql-dropfunction.html">DROP FUNCTION</a></span><span class="refpurpose"> — remove a function</span></dt><dt><span class="refentrytitle"><a href="sql-dropgroup.html">DROP GROUP</a></span><span class="refpurpose"> — remove a database role</span></dt><dt><span class="refentrytitle"><a href="sql-dropindex.html">DROP INDEX</a></span><span class="refpurpose"> — remove an index</span></dt><dt><span class="refentrytitle"><a href="sql-droplanguage.html">DROP LANGUAGE</a></span><span class="refpurpose"> — remove a procedural language</span></dt><dt><span class="refentrytitle"><a href="sql-dropmaterializedview.html">DROP MATERIALIZED VIEW</a></span><span class="refpurpose"> — remove a materialized view</span></dt><dt><span class="refentrytitle"><a href="sql-dropoperator.html">DROP OPERATOR</a></span><span class="refpurpose"> — remove an operator</span></dt><dt><span class="refentrytitle"><a href="sql-dropopclass.html">DROP OPERATOR CLASS</a></span><span class="refpurpose"> — remove an operator class</span></dt><dt><span class="refentrytitle"><a href="sql-dropopfamily.html">DROP OPERATOR FAMILY</a></span><span class="refpurpose"> — remove an operator family</span></dt><dt><span class="refentrytitle"><a href="sql-drop-owned.html">DROP OWNED</a></span><span class="refpurpose"> — remove database objects owned by a database role</span></dt><dt><span class="refentrytitle"><a href="sql-droppolicy.html">DROP POLICY</a></span><span class="refpurpose"> — remove a row-level security policy from a table</span></dt><dt><span class="refentrytitle"><a href="sql-dropprocedure.html">DROP PROCEDURE</a></span><span class="refpurpose"> — remove a procedure</span></dt><dt><span class="refentrytitle"><a href="sql-droppublication.html">DROP PUBLICATION</a></span><span class="refpurpose"> — remove a publication</span></dt><dt><span class="refentrytitle"><a href="sql-droprole.html">DROP ROLE</a></span><span class="refpurpose"> — remove a database role</span></dt><dt><span class="refentrytitle"><a href="sql-droproutine.html">DROP ROUTINE</a></span><span class="refpurpose"> — remove a routine</span></dt><dt><span class="refentrytitle"><a href="sql-droprule.html">DROP RULE</a></span><span class="refpurpose"> — remove a rewrite rule</span></dt><dt><span class="refentrytitle"><a href="sql-dropschema.html">DROP SCHEMA</a></span><span class="refpurpose"> — remove a schema</span></dt><dt><span class="refentrytitle"><a href="sql-dropsequence.html">DROP SEQUENCE</a></span><span class="refpurpose"> — remove a sequence</span></dt><dt><span class="refentrytitle"><a href="sql-dropserver.html">DROP SERVER</a></span><span class="refpurpose"> — remove a foreign server descriptor</span></dt><dt><span class="refentrytitle"><a href="sql-dropstatistics.html">DROP STATISTICS</a></span><span class="refpurpose"> — remove extended statistics</span></dt><dt><span class="refentrytitle"><a href="sql-dropsubscription.html">DROP SUBSCRIPTION</a></span><span class="refpurpose"> — remove a subscription</span></dt><dt><span class="refentrytitle"><a href="sql-droptable.html">DROP TABLE</a></span><span class="refpurpose"> — remove a table</span></dt><dt><span class="refentrytitle"><a href="sql-droptablespace.html">DROP TABLESPACE</a></span><span class="refpurpose"> — remove a tablespace</span></dt><dt><span class="refentrytitle"><a href="sql-droptsconfig.html">DROP TEXT SEARCH CONFIGURATION</a></span><span class="refpurpose"> — remove a text search configuration</span></dt><dt><span class="refentrytitle"><a href="sql-droptsdictionary.html">DROP TEXT SEARCH DICTIONARY</a></span><span class="refpurpose"> — remove a text search dictionary</span></dt><dt><span class="refentrytitle"><a href="sql-droptsparser.html">DROP TEXT SEARCH PARSER</a></span><span class="refpurpose"> — remove a text search parser</span></dt><dt><span class="refentrytitle"><a href="sql-droptstemplate.html">DROP TEXT SEARCH TEMPLATE</a></span><span class="refpurpose"> — remove a text search template</span></dt><dt><span class="refentrytitle"><a href="sql-droptransform.html">DROP TRANSFORM</a></span><span class="refpurpose"> — remove a transform</span></dt><dt><span class="refentrytitle"><a href="sql-droptrigger.html">DROP TRIGGER</a></span><span class="refpurpose"> — remove a trigger</span></dt><dt><span class="refentrytitle"><a href="sql-droptype.html">DROP TYPE</a></span><span class="refpurpose"> — remove a data type</span></dt><dt><span class="refentrytitle"><a href="sql-dropuser.html">DROP USER</a></span><span class="refpurpose"> — remove a database role</span></dt><dt><span class="refentrytitle"><a href="sql-dropusermapping.html">DROP USER MAPPING</a></span><span class="refpurpose"> — remove a user mapping for a foreign server</span></dt><dt><span class="refentrytitle"><a href="sql-dropview.html">DROP VIEW</a></span><span class="refpurpose"> — remove a view</span></dt><dt><span class="refentrytitle"><a href="sql-end.html">END</a></span><span class="refpurpose"> — commit the current transaction</span></dt><dt><span class="refentrytitle"><a href="sql-execute.html">EXECUTE</a></span><span class="refpurpose"> — execute a prepared statement</span></dt><dt><span class="refentrytitle"><a href="sql-explain.html">EXPLAIN</a></span><span class="refpurpose"> — show the execution plan of a statement</span></dt><dt><span class="refentrytitle"><a href="sql-fetch.html">FETCH</a></span><span class="refpurpose"> — retrieve rows from a query using a cursor</span></dt><dt><span class="refentrytitle"><a href="sql-grant.html">GRANT</a></span><span class="refpurpose"> — define access privileges</span></dt><dt><span class="refentrytitle"><a href="sql-importforeignschema.html">IMPORT FOREIGN SCHEMA</a></span><span class="refpurpose"> — import table definitions from a foreign server</span></dt><dt><span class="refentrytitle"><a href="sql-insert.html">INSERT</a></span><span class="refpurpose"> — create new rows in a table</span></dt><dt><span class="refentrytitle"><a href="sql-listen.html">LISTEN</a></span><span class="refpurpose"> — listen for a notification</span></dt><dt><span class="refentrytitle"><a href="sql-load.html">LOAD</a></span><span class="refpurpose"> — load a shared library file</span></dt><dt><span class="refentrytitle"><a href="sql-lock.html">LOCK</a></span><span class="refpurpose"> — lock a table</span></dt><dt><span class="refentrytitle"><a href="sql-merge.html">MERGE</a></span><span class="refpurpose"> — conditionally insert, update, or delete rows of a table</span></dt><dt><span class="refentrytitle"><a href="sql-move.html">MOVE</a></span><span class="refpurpose"> — position a cursor</span></dt><dt><span class="refentrytitle"><a href="sql-notify.html">NOTIFY</a></span><span class="refpurpose"> — generate a notification</span></dt><dt><span class="refentrytitle"><a href="sql-prepare.html">PREPARE</a></span><span class="refpurpose"> — prepare a statement for execution</span></dt><dt><span class="refentrytitle"><a href="sql-prepare-transaction.html">PREPARE TRANSACTION</a></span><span class="refpurpose"> — prepare the current transaction for two-phase commit</span></dt><dt><span class="refentrytitle"><a href="sql-reassign-owned.html">REASSIGN OWNED</a></span><span class="refpurpose"> — change the ownership of database objects owned by a database role</span></dt><dt><span class="refentrytitle"><a href="sql-refreshmaterializedview.html">REFRESH MATERIALIZED VIEW</a></span><span class="refpurpose"> — replace the contents of a materialized view</span></dt><dt><span class="refentrytitle"><a href="sql-reindex.html">REINDEX</a></span><span class="refpurpose"> — rebuild indexes</span></dt><dt><span class="refentrytitle"><a href="sql-release-savepoint.html">RELEASE SAVEPOINT</a></span><span class="refpurpose"> — destroy a previously defined savepoint</span></dt><dt><span class="refentrytitle"><a href="sql-reset.html">RESET</a></span><span class="refpurpose"> — restore the value of a run-time parameter to the default value</span></dt><dt><span class="refentrytitle"><a href="sql-revoke.html">REVOKE</a></span><span class="refpurpose"> — remove access privileges</span></dt><dt><span class="refentrytitle"><a href="sql-rollback.html">ROLLBACK</a></span><span class="refpurpose"> — abort the current transaction</span></dt><dt><span class="refentrytitle"><a href="sql-rollback-prepared.html">ROLLBACK PREPARED</a></span><span class="refpurpose"> — cancel a transaction that was earlier prepared for two-phase commit</span></dt><dt><span class="refentrytitle"><a href="sql-rollback-to.html">ROLLBACK TO SAVEPOINT</a></span><span class="refpurpose"> — roll back to a savepoint</span></dt><dt><span class="refentrytitle"><a href="sql-savepoint.html">SAVEPOINT</a></span><span class="refpurpose"> — define a new savepoint within the current transaction</span></dt><dt><span class="refentrytitle"><a href="sql-security-label.html">SECURITY LABEL</a></span><span class="refpurpose"> — define or change a security label applied to an object</span></dt><dt><span class="refentrytitle"><a href="sql-select.html">SELECT</a></span><span class="refpurpose"> — retrieve rows from a table or view</span></dt><dt><span class="refentrytitle"><a href="sql-selectinto.html">SELECT INTO</a></span><span class="refpurpose"> — define a new table from the results of a query</span></dt><dt><span class="refentrytitle"><a href="sql-set.html">SET</a></span><span class="refpurpose"> — change a run-time parameter</span></dt><dt><span class="refentrytitle"><a href="sql-set-constraints.html">SET CONSTRAINTS</a></span><span class="refpurpose"> — set constraint check timing for the current transaction</span></dt><dt><span class="refentrytitle"><a href="sql-set-role.html">SET ROLE</a></span><span class="refpurpose"> — set the current user identifier of the current session</span></dt><dt><span class="refentrytitle"><a href="sql-set-session-authorization.html">SET SESSION AUTHORIZATION</a></span><span class="refpurpose"> — set the session user identifier and the current user identifier of the current session</span></dt><dt><span class="refentrytitle"><a href="sql-set-transaction.html">SET TRANSACTION</a></span><span class="refpurpose"> — set the characteristics of the current transaction</span></dt><dt><span class="refentrytitle"><a href="sql-show.html">SHOW</a></span><span class="refpurpose"> — show the value of a run-time parameter</span></dt><dt><span class="refentrytitle"><a href="sql-start-transaction.html">START TRANSACTION</a></span><span class="refpurpose"> — start a transaction block</span></dt><dt><span class="refentrytitle"><a href="sql-truncate.html">TRUNCATE</a></span><span class="refpurpose"> — empty a table or set of tables</span></dt><dt><span class="refentrytitle"><a href="sql-unlisten.html">UNLISTEN</a></span><span class="refpurpose"> — stop listening for a notification</span></dt><dt><span class="refentrytitle"><a href="sql-update.html">UPDATE</a></span><span class="refpurpose"> — update rows of a table</span></dt><dt><span class="refentrytitle"><a href="sql-vacuum.html">VACUUM</a></span><span class="refpurpose"> — garbage-collect and optionally analyze a database</span></dt><dt><span class="refentrytitle"><a href="sql-values.html">VALUES</a></span><span class="refpurpose"> — compute a set of rows</span></dt></dl></dd><dt><span class="reference"><a href="reference-client.html">II. PostgreSQL Client Applications</a></span></dt><dd><dl><dt><span class="refentrytitle"><a href="app-clusterdb.html"><span class="application">clusterdb</span></a></span><span class="refpurpose"> — cluster a <span class="productname">PostgreSQL</span> database</span></dt><dt><span class="refentrytitle"><a href="app-createdb.html"><span class="application">createdb</span></a></span><span class="refpurpose"> — create a new <span class="productname">PostgreSQL</span> database</span></dt><dt><span class="refentrytitle"><a href="app-createuser.html"><span class="application">createuser</span></a></span><span class="refpurpose"> — define a new <span class="productname">PostgreSQL</span> user account</span></dt><dt><span class="refentrytitle"><a href="app-dropdb.html"><span class="application">dropdb</span></a></span><span class="refpurpose"> — remove a <span class="productname">PostgreSQL</span> database</span></dt><dt><span class="refentrytitle"><a href="app-dropuser.html"><span class="application">dropuser</span></a></span><span class="refpurpose"> — remove a <span class="productname">PostgreSQL</span> user account</span></dt><dt><span class="refentrytitle"><a href="app-ecpg.html"><span class="application">ecpg</span></a></span><span class="refpurpose"> — embedded SQL C preprocessor</span></dt><dt><span class="refentrytitle"><a href="app-pgamcheck.html"><span class="application">pg_amcheck</span></a></span><span class="refpurpose"> — checks for corruption in one or more
  <span class="productname">PostgreSQL</span> databases</span></dt><dt><span class="refentrytitle"><a href="app-pgbasebackup.html"><span class="application">pg_basebackup</span></a></span><span class="refpurpose"> — take a base backup of a <span class="productname">PostgreSQL</span> cluster</span></dt><dt><span class="refentrytitle"><a href="pgbench.html"><span class="application">pgbench</span></a></span><span class="refpurpose"> — run a benchmark test on <span class="productname">PostgreSQL</span></span></dt><dt><span class="refentrytitle"><a href="app-pgconfig.html"><span class="application">pg_config</span></a></span><span class="refpurpose"> — retrieve information about the installed version of <span class="productname">PostgreSQL</span></span></dt><dt><span class="refentrytitle"><a href="app-pgdump.html"><span class="application">pg_dump</span></a></span><span class="refpurpose"> — 
   extract a <span class="productname">PostgreSQL</span> database into a script file or other archive file
  </span></dt><dt><span class="refentrytitle"><a href="app-pg-dumpall.html"><span class="application">pg_dumpall</span></a></span><span class="refpurpose"> — extract a <span class="productname">PostgreSQL</span> database cluster into a script file</span></dt><dt><span class="refentrytitle"><a href="app-pg-isready.html"><span class="application">pg_isready</span></a></span><span class="refpurpose"> — check the connection status of a <span class="productname">PostgreSQL</span> server</span></dt><dt><span class="refentrytitle"><a href="app-pgreceivewal.html"><span class="application">pg_receivewal</span></a></span><span class="refpurpose"> — stream write-ahead logs from a <span class="productname">PostgreSQL</span> server</span></dt><dt><span class="refentrytitle"><a href="app-pgrecvlogical.html"><span class="application">pg_recvlogical</span></a></span><span class="refpurpose"> — control <span class="productname">PostgreSQL</span> logical decoding streams</span></dt><dt><span class="refentrytitle"><a href="app-pgrestore.html"><span class="application">pg_restore</span></a></span><span class="refpurpose"> — 
   restore a <span class="productname">PostgreSQL</span> database from an
   archive file created by <span class="application">pg_dump</span>
  </span></dt><dt><span class="refentrytitle"><a href="app-pgverifybackup.html"><span class="application">pg_verifybackup</span></a></span><span class="refpurpose"> — verify the integrity of a base backup of a
  <span class="productname">PostgreSQL</span> cluster</span></dt><dt><span class="refentrytitle"><a href="app-psql.html"><span class="application">psql</span></a></span><span class="refpurpose"> — 
      <span class="productname">PostgreSQL</span> interactive terminal
    </span></dt><dt><span class="refentrytitle"><a href="app-reindexdb.html"><span class="application">reindexdb</span></a></span><span class="refpurpose"> — reindex a <span class="productname">PostgreSQL</span> database</span></dt><dt><span class="refentrytitle"><a href="app-vacuumdb.html"><span class="application">vacuumdb</span></a></span><span class="refpurpose"> — garbage-collect and analyze a <span class="productname">PostgreSQL</span> database</span></dt></dl></dd><dt><span class="reference"><a href="reference-server.html">III. PostgreSQL Server Applications</a></span></dt><dd><dl><dt><span class="refentrytitle"><a href="app-initdb.html"><span class="application">initdb</span></a></span><span class="refpurpose"> — create a new <span class="productname">PostgreSQL</span> database cluster</span></dt><dt><span class="refentrytitle"><a href="pgarchivecleanup.html"><span class="application">pg_archivecleanup</span></a></span><span class="refpurpose"> — clean up <span class="productname">PostgreSQL</span> WAL archive files</span></dt><dt><span class="refentrytitle"><a href="app-pgchecksums.html"><span class="application">pg_checksums</span></a></span><span class="refpurpose"> — enable, disable or check data checksums in a <span class="productname">PostgreSQL</span> database cluster</span></dt><dt><span class="refentrytitle"><a href="app-pgcontroldata.html"><span class="application">pg_controldata</span></a></span><span class="refpurpose"> — display control information of a <span class="productname">PostgreSQL</span> database cluster</span></dt><dt><span class="refentrytitle"><a href="app-pg-ctl.html"><span class="application">pg_ctl</span></a></span><span class="refpurpose"> — initialize, start, stop, or control a <span class="productname">PostgreSQL</span> server</span></dt><dt><span class="refentrytitle"><a href="app-pgresetwal.html"><span class="application">pg_resetwal</span></a></span><span class="refpurpose"> — reset the write-ahead log and other control information of a <span class="productname">PostgreSQL</span> database cluster</span></dt><dt><span class="refentrytitle"><a href="app-pgrewind.html"><span class="application">pg_rewind</span></a></span><span class="refpurpose"> — synchronize a <span class="productname">PostgreSQL</span> data directory with another data directory that was forked from it</span></dt><dt><span class="refentrytitle"><a href="pgtestfsync.html"><span class="application">pg_test_fsync</span></a></span><span class="refpurpose"> — determine fastest <code class="varname">wal_sync_method</code> for <span class="productname">PostgreSQL</span></span></dt><dt><span class="refentrytitle"><a href="pgtesttiming.html"><span class="application">pg_test_timing</span></a></span><span class="refpurpose"> — measure timing overhead</span></dt><dt><span class="refentrytitle"><a href="pgupgrade.html"><span class="application">pg_upgrade</span></a></span><span class="refpurpose"> — upgrade a <span class="productname">PostgreSQL</span> server instance</span></dt><dt><span class="refentrytitle"><a href="pgwaldump.html"><span class="application">pg_waldump</span></a></span><span class="refpurpose"> — display a human-readable rendering of the write-ahead log of a <span class="productname">PostgreSQL</span> database cluster</span></dt><dt><span class="refentrytitle"><a href="app-postgres.html"><span class="application">postgres</span></a></span><span class="refpurpose"> — <span class="productname">PostgreSQL</span> database server</span></dt><dt><span class="refentrytitle"><a href="app-postmaster.html"><span class="application">postmaster</span></a></span><span class="refpurpose"> — <span class="productname">PostgreSQL</span> database server</span></dt></dl></dd></dl></div></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="archive-module-callbacks.html" title="51.2. Archive Module Callbacks">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="index.html" title="PostgreSQL 15.5 Documentation">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="sql-commands.html" title="SQL Commands">Next</a></td></tr><tr><td width="40%" align="left" valign="top">51.2. Archive Module Callbacks </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 15.5 Documentation">Home</a></td><td width="40%" align="right" valign="top"> SQL Commands</td></tr></table></div></body></html>