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1ff01b3902
IDs in SGML are case insensitive, and we have accumulated a mix of upper and lower case IDs, including different variants of the same ID. In XML, these will be case sensitive, so we need to fix up those differences. Going to all lower case seems most straightforward, and the current build process already makes all anchors and lower case anyway during the SGML->XML conversion, so this doesn't create any difference in the output right now. A future XML-only build process would, however, maintain any mixed case ID spellings in the output, so that is another reason to clean this up beforehand. Author: Alexander Lakhin <exclusion@gmail.com>
114 lines
2.9 KiB
Plaintext
114 lines
2.9 KiB
Plaintext
<!--
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doc/src/sgml/ref/reset.sgml
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PostgreSQL documentation
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-->
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<refentry id="sql-reset">
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<indexterm zone="sql-reset">
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<primary>RESET</primary>
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</indexterm>
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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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<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</command> 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</quote>, 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</command> is the same as
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<command>SET</command>: 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</varname> configuration variable to its default value:
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<screen>
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RESET timezone;
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</screen></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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