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<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/show.sgml,v 1.17 2002/05/17 01:19:16 tgl Exp $
PostgreSQL documentation
-->
<refentry id="SQL-SHOW">
<refmeta>
<refentrytitle id="SQL-SHOW-TITLE">SHOW</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>SHOW</refname>
<refpurpose>show the value of a run-time parameter</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
SHOW <replaceable class="PARAMETER">name</replaceable>
</synopsis>
<synopsis>
SHOW ALL
</synopsis>
<refsect2 id="R2-SQL-SHOW-1">
<title>Inputs</title>
<para>
<variablelist>
<varlistentry>
<term><replaceable class="PARAMETER">name</replaceable></term>
<listitem>
<para>
The name of a run-time parameter. See
<xref linkend="sql-set" endterm="sql-set-title">
for a list.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>ALL</term>
<listitem>
<para>
Show all current session parameters.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
</refsynopsisdiv>
<refsect1 id="R1-SQL-SHOW-1">
<title>Description</title>
<para>
<command>SHOW</command> will display the current setting of a
run-time parameter. These variables can be set using the
<command>SET</command> statement or are determined at session start.
</para>
</refsect1>
<refsect1>
<title>Diagnostics</title>
<para>
<variablelist>
<varlistentry>
<term><computeroutput>ERROR: not a valid option name: <replaceable>name</replaceable></computeroutput></term>
<listitem>
<para>
Message returned if <replaceable>variable</replaceable> does
not stand for an existing parameter.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect1>
<refsect1 id="R1-SQL-SHOW-2">
<title>Examples</title>
<para>
Show the current <literal>DateStyle</literal> setting:
<screen>
SHOW DateStyle;
INFO: DateStyle is ISO with US (NonEuropean) conventions
</screen>
</para>
<para>
Show the current genetic optimizer (<literal>geqo</literal>) setting:
<screen>
SHOW GEQO;
INFO: geqo is on
</screen>
</para>
</refsect1>
<refsect1 id="R1-SQL-SHOW-3">
<title>Compatibility</title>
<para>
The <command>SHOW</command> command is a
<productname>PostgreSQL</productname> extension.
</para>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:nil
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
sgml-parent-document:nil
sgml-default-dtd-file:"../reference.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:"/usr/lib/sgml/catalog"
sgml-local-ecat-files:nil
End:
-->
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