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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 >RESET</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="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="RELEASE SAVEPOINT" HREF="sql-release-savepoint.html"><LINK REL="NEXT" TITLE="REVOKE" HREF="sql-revoke.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="REFENTRY" ><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="RELEASE SAVEPOINT" HREF="sql-release-savepoint.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="REVOKE" HREF="sql-revoke.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-RESET" ></A >RESET</H1 ><DIV CLASS="REFNAMEDIV" ><A NAME="AEN77029" ></A ><H2 >Name</H2 >RESET -- restore the value of a run-time parameter to the default value</DIV ><DIV CLASS="REFSYNOPSISDIV" ><A NAME="AEN77034" ></A ><H2 >Synopsis</H2 ><PRE CLASS="SYNOPSIS" >RESET <TT CLASS="REPLACEABLE" ><I >configuration_parameter</I ></TT > RESET ALL</PRE ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN77037" ></A ><H2 >Description</H2 ><P > <TT CLASS="COMMAND" >RESET</TT > restores run-time parameters to their default values. <TT CLASS="COMMAND" >RESET</TT > is an alternative spelling for </P><PRE CLASS="SYNOPSIS" >SET <TT CLASS="REPLACEABLE" ><I >configuration_parameter</I ></TT > TO DEFAULT</PRE ><P> Refer to <A HREF="sql-set.html" >SET</A > for details. </P ><P > The default value is defined as the value that the parameter would have had, if no <TT CLASS="COMMAND" >SET</TT > had ever been issued for it in the current session. The actual source of this value might be a compiled-in default, the configuration file, command-line options, or per-database or per-user default settings. This is subtly different from defining it as <SPAN CLASS="QUOTE" >"the value that the parameter had at session start"</SPAN >, because if the value came from the configuration file, it will be reset to whatever is specified by the configuration file now. See <A HREF="runtime-config.html" >Chapter 18</A > for details. </P ><P > The transactional behavior of <TT CLASS="COMMAND" >RESET</TT > is the same as <TT CLASS="COMMAND" >SET</TT >: its effects will be undone by transaction rollback. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN77052" ></A ><H2 >Parameters</H2 ><P ></P ><DIV CLASS="VARIABLELIST" ><DL ><DT ><TT CLASS="REPLACEABLE" ><I >configuration_parameter</I ></TT ></DT ><DD ><P > Name of a settable run-time parameter. Available parameters are documented in <A HREF="runtime-config.html" >Chapter 18</A > and on the <A HREF="sql-set.html" >SET</A > reference page. </P ></DD ><DT ><TT CLASS="LITERAL" >ALL</TT ></DT ><DD ><P > Resets all settable run-time parameters to default values. </P ></DD ></DL ></DIV ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN77067" ></A ><H2 >Examples</H2 ><P > Set the <TT CLASS="VARNAME" >timezone</TT > configuration variable to its default value: </P><PRE CLASS="SCREEN" >RESET timezone;</PRE ><P></P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN77072" ></A ><H2 >Compatibility</H2 ><P > <TT CLASS="COMMAND" >RESET</TT > is a <SPAN CLASS="PRODUCTNAME" >PostgreSQL</SPAN > extension. </P ></DIV ><DIV CLASS="REFSECT1" ><A NAME="AEN77077" ></A ><H2 >See Also</H2 ><A HREF="sql-set.html" >SET</A >, <A HREF="sql-show.html" >SHOW</A ></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="sql-release-savepoint.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="sql-revoke.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >RELEASE SAVEPOINT</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >REVOKE</TD ></TR ></TABLE ></DIV ></BODY ></HTML >