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The endterm attribute is mainly useful when the toolchain does not support automatic link target text generation for a particular situation. In the past, this was required by the man page tools for all reference page links, but that is no longer the case, and it now actually gets in the way of proper automatic link text generation. The only remaining use cases are currently xrefs to refsects.
115 lines
3.0 KiB
Plaintext
115 lines
3.0 KiB
Plaintext
<!--
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$PostgreSQL: pgsql/doc/src/sgml/ref/reset.sgml,v 1.38 2010/04/03 07:23:02 petere Exp $
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PostgreSQL documentation
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-->
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<refentry id="SQL-RESET">
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<refmeta>
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<refentrytitle>RESET</refentrytitle>
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<manvolnum>7</manvolnum>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>RESET</refname>
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<refpurpose>restore the value of a run-time parameter to the default value</refpurpose>
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</refnamediv>
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<indexterm zone="sql-reset">
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<primary>RESET</primary>
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</indexterm>
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<refsynopsisdiv>
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<synopsis>
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RESET <replaceable class="PARAMETER">configuration_parameter</replaceable>
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RESET ALL
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</synopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<command>RESET</command> restores run-time parameters to their
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default values. <command>RESET</command> is an alternative
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spelling for
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<synopsis>
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SET <replaceable class="parameter">configuration_parameter</replaceable> TO DEFAULT
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</synopsis>
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Refer to <xref linkend="sql-set"> for
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details.
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</para>
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<para>
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The default value is defined as the value that the parameter would
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have had, if no <command>SET</> had ever been issued for it in the
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current session. The actual source of this value might be a
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compiled-in default, the configuration file, command-line options,
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or per-database or per-user default settings. This is subtly different
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from defining it as <quote>the value that the parameter had at session
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start</>, because if the value came from the configuration file, it
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will be reset to whatever is specified by the configuration file now.
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See <xref linkend="runtime-config"> for details.
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</para>
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<para>
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The transactional behavior of <command>RESET</> is the same as
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<command>SET</>: its effects will be undone by transaction rollback.
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</para>
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</refsect1>
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<refsect1>
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<title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><replaceable class="PARAMETER">configuration_parameter</replaceable></term>
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<listitem>
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<para>
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Name of a settable run-time parameter. Available parameters are
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documented in <xref linkend="runtime-config"> and on the
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<xref linkend="sql-set"> reference page.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><literal>ALL</literal></term>
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<listitem>
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<para>
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Resets all settable run-time parameters to default values.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<para>
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Set the <varname>timezone</> configuration variable to its default value:
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<screen>
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RESET timezone;
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</screen>
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</para>
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</refsect1>
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<refsect1>
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<title>Compatibility</title>
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<para>
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<command>RESET</command> is a <productname>PostgreSQL</productname> extension.
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</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<simplelist type="inline">
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<member><xref linkend="SQL-SET"></member>
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<member><xref linkend="SQL-SHOW"></member>
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</simplelist>
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</refsect1>
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</refentry>
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