114 lines
2.9 KiB
Plaintext
114 lines
2.9 KiB
Plaintext
<!--
|
|
doc/src/sgml/ref/reset.sgml
|
|
PostgreSQL documentation
|
|
-->
|
|
|
|
<refentry id="sql-reset">
|
|
<indexterm zone="sql-reset">
|
|
<primary>RESET</primary>
|
|
</indexterm>
|
|
|
|
<refmeta>
|
|
<refentrytitle>RESET</refentrytitle>
|
|
<manvolnum>7</manvolnum>
|
|
<refmiscinfo>SQL - Language Statements</refmiscinfo>
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
|
<refname>RESET</refname>
|
|
<refpurpose>restore the value of a run-time parameter to the default value</refpurpose>
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
<synopsis>
|
|
RESET <replaceable class="parameter">configuration_parameter</replaceable>
|
|
RESET ALL
|
|
</synopsis>
|
|
</refsynopsisdiv>
|
|
|
|
<refsect1>
|
|
<title>Description</title>
|
|
|
|
<para>
|
|
<command>RESET</command> restores run-time parameters to their
|
|
default values. <command>RESET</command> is an alternative
|
|
spelling for
|
|
<synopsis>
|
|
SET <replaceable class="parameter">configuration_parameter</replaceable> TO DEFAULT
|
|
</synopsis>
|
|
Refer to <xref linkend="sql-set"/> for
|
|
details.
|
|
</para>
|
|
|
|
<para>
|
|
The default value is defined as the value that the parameter would
|
|
have had, if no <command>SET</command> 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 <quote>the value that the parameter had at session
|
|
start</quote>, because if the value came from the configuration file, it
|
|
will be reset to whatever is specified by the configuration file now.
|
|
See <xref linkend="runtime-config"/> for details.
|
|
</para>
|
|
|
|
<para>
|
|
The transactional behavior of <command>RESET</command> is the same as
|
|
<command>SET</command>: its effects will be undone by transaction rollback.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Parameters</title>
|
|
|
|
<variablelist>
|
|
<varlistentry>
|
|
<term><replaceable class="parameter">configuration_parameter</replaceable></term>
|
|
<listitem>
|
|
<para>
|
|
Name of a settable run-time parameter. Available parameters are
|
|
documented in <xref linkend="runtime-config"/> and on the
|
|
<xref linkend="sql-set"/> reference page.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
|
|
<varlistentry>
|
|
<term><literal>ALL</literal></term>
|
|
<listitem>
|
|
<para>
|
|
Resets all settable run-time parameters to default values.
|
|
</para>
|
|
</listitem>
|
|
</varlistentry>
|
|
</variablelist>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Examples</title>
|
|
|
|
<para>
|
|
Set the <varname>timezone</varname> configuration variable to its default value:
|
|
<screen>
|
|
RESET timezone;
|
|
</screen></para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>Compatibility</title>
|
|
|
|
<para>
|
|
<command>RESET</command> is a <productname>PostgreSQL</productname> extension.
|
|
</para>
|
|
</refsect1>
|
|
|
|
<refsect1>
|
|
<title>See Also</title>
|
|
|
|
<simplelist type="inline">
|
|
<member><xref linkend="sql-set"/></member>
|
|
<member><xref linkend="sql-show"/></member>
|
|
</simplelist>
|
|
</refsect1>
|
|
</refentry>
|