1999-07-22 17:09:15 +02:00
|
|
|
<!--
|
2003-04-25 21:45:10 +02:00
|
|
|
$Header: /cvsroot/pgsql/doc/src/sgml/ref/show.sgml,v 1.25 2003/04/25 19:45:08 tgl Exp $
|
2001-12-08 04:24:40 +01:00
|
|
|
PostgreSQL documentation
|
1999-07-22 17:09:15 +02:00
|
|
|
-->
|
|
|
|
|
1999-06-14 09:37:05 +02:00
|
|
|
<refentry id="SQL-SHOW">
|
|
|
|
<refmeta>
|
2000-06-18 23:24:54 +02:00
|
|
|
<refentrytitle id="SQL-SHOW-TITLE">SHOW</refentrytitle>
|
1999-06-14 09:37:05 +02:00
|
|
|
<refmiscinfo>SQL - Language Statements</refmiscinfo>
|
|
|
|
</refmeta>
|
|
|
|
<refnamediv>
|
2000-06-18 23:24:54 +02:00
|
|
|
<refname>SHOW</refname>
|
2001-09-03 14:57:50 +02:00
|
|
|
<refpurpose>show the value of a run-time parameter</refpurpose>
|
1999-06-14 09:37:05 +02:00
|
|
|
</refnamediv>
|
|
|
|
<refsynopsisdiv>
|
|
|
|
<synopsis>
|
2000-06-18 23:24:54 +02:00
|
|
|
SHOW <replaceable class="PARAMETER">name</replaceable>
|
1999-06-14 09:37:05 +02:00
|
|
|
</synopsis>
|
2001-06-07 06:50:57 +02:00
|
|
|
<synopsis>
|
|
|
|
SHOW ALL
|
|
|
|
</synopsis>
|
1998-09-01 17:53:09 +02:00
|
|
|
|
1999-06-14 09:37:05 +02:00
|
|
|
<refsect2 id="R2-SQL-SHOW-1">
|
2000-06-18 23:24:54 +02:00
|
|
|
<title>Inputs</title>
|
1998-12-29 03:24:47 +01:00
|
|
|
|
1999-07-14 22:32:59 +02:00
|
|
|
<para>
|
1999-06-14 09:37:05 +02:00
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
2000-06-18 23:24:54 +02:00
|
|
|
<term><replaceable class="PARAMETER">name</replaceable></term>
|
1999-06-14 09:37:05 +02:00
|
|
|
<listitem>
|
|
|
|
<para>
|
2000-06-18 23:24:54 +02:00
|
|
|
The name of a run-time parameter. See
|
2000-12-26 00:15:27 +01:00
|
|
|
<xref linkend="sql-set" endterm="sql-set-title">
|
2000-06-18 23:24:54 +02:00
|
|
|
for a list.
|
1999-06-14 09:37:05 +02:00
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
2001-06-07 06:50:57 +02:00
|
|
|
<varlistentry>
|
|
|
|
<term>ALL</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Show all current session parameters.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
1999-06-14 09:37:05 +02:00
|
|
|
</variablelist>
|
|
|
|
</para>
|
|
|
|
</refsect2>
|
1998-12-29 03:24:47 +01:00
|
|
|
|
2000-06-18 23:24:54 +02:00
|
|
|
</refsynopsisdiv>
|
|
|
|
|
|
|
|
<refsect1 id="R1-SQL-SHOW-1">
|
|
|
|
<title>Description</title>
|
|
|
|
<para>
|
2003-04-25 21:45:10 +02:00
|
|
|
<command>SHOW</command> will display the current setting of
|
|
|
|
run-time parameters. These variables can be set using the
|
2002-08-04 07:09:36 +02:00
|
|
|
<command>SET</command> statement, by editing the
|
2003-04-25 21:45:10 +02:00
|
|
|
<filename>postgresql.conf</filename> configuration file, through the
|
|
|
|
<envar>PGOPTIONS</envar> environmental variable (when using libpq
|
|
|
|
or a libpq-based application), or through
|
|
|
|
command-line flags when starting the
|
2002-08-04 07:09:36 +02:00
|
|
|
<application>postmaster</application>.
|
2000-06-18 23:24:54 +02:00
|
|
|
</para>
|
2002-10-13 18:55:05 +02:00
|
|
|
|
|
|
|
<para>
|
2003-01-19 01:13:31 +01:00
|
|
|
Even with <varname>autocommit</> set to <literal>off</>, <command>SHOW</>
|
2002-10-13 18:55:05 +02:00
|
|
|
does not start a new transaction block. See the
|
2003-03-25 17:15:44 +01:00
|
|
|
<varname>autocommit</> section in <xref linkend="runtime-config"> for details.
|
2002-10-13 18:55:05 +02:00
|
|
|
</para>
|
2003-04-25 21:45:10 +02:00
|
|
|
|
|
|
|
<para>
|
|
|
|
Available parameters are documented in
|
|
|
|
<xref linkend="runtime-config"> and on the
|
|
|
|
<xref linkend="SQL-SET" endterm="SQL-SET-title"> reference page.
|
|
|
|
In addition, there are a few parameters that can be shown but not set:
|
|
|
|
|
|
|
|
<variablelist>
|
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
<term>SERVER_VERSION</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Shows the server's version number.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
<term>SERVER_ENCODING</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Shows the server-side multibyte encoding. At present, this
|
|
|
|
parameter can be shown but not set, because the encoding is
|
|
|
|
determined at database creation time.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
<term>LC_COLLATE</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Shows the database's locale setting for collation (text ordering).
|
|
|
|
At present, this parameter can be shown but not set, because the
|
|
|
|
setting is determined at <application>initdb</> time.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
<varlistentry>
|
|
|
|
<term>LC_CTYPE</term>
|
|
|
|
<listitem>
|
|
|
|
<para>
|
|
|
|
Shows the database's locale setting for character set considerations.
|
|
|
|
At present, this parameter can be shown but not set, because the
|
|
|
|
setting is determined at <application>initdb</> time.
|
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
|
|
|
|
</variablelist>
|
|
|
|
</para>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
Use <xref linkend="SQL-SET" endterm="SQL-SET-title"> to set the value
|
|
|
|
of settable parameters.
|
|
|
|
</para>
|
2000-06-18 23:24:54 +02:00
|
|
|
</refsect1>
|
|
|
|
|
|
|
|
<refsect1>
|
|
|
|
<title>Diagnostics</title>
|
1998-12-29 03:24:47 +01:00
|
|
|
|
1999-07-14 22:32:59 +02:00
|
|
|
<para>
|
1999-06-14 09:37:05 +02:00
|
|
|
<variablelist>
|
|
|
|
<varlistentry>
|
2002-08-04 07:09:36 +02:00
|
|
|
<term><computeroutput>ERROR: Option '<replaceable>name</replaceable>'
|
|
|
|
is not recognized</computeroutput></term>
|
1999-06-14 09:37:05 +02:00
|
|
|
<listitem>
|
|
|
|
<para>
|
2002-08-04 07:09:36 +02:00
|
|
|
Message returned if <replaceable>name</replaceable> does
|
2003-04-25 21:45:10 +02:00
|
|
|
not stand for a known parameter.
|
1999-06-14 09:37:05 +02:00
|
|
|
</para>
|
|
|
|
</listitem>
|
|
|
|
</varlistentry>
|
|
|
|
</variablelist>
|
|
|
|
</para>
|
|
|
|
</refsect1>
|
|
|
|
|
2003-03-25 17:15:44 +01:00
|
|
|
<refsect1>
|
|
|
|
<title>Notes</title>
|
|
|
|
|
|
|
|
<para>
|
|
|
|
The function <function>current_setting</function> produces
|
|
|
|
equivalent output. See <xref linkend="functions-misc">.
|
|
|
|
</para>
|
|
|
|
</refsect1>
|
|
|
|
|
1999-06-14 09:37:05 +02:00
|
|
|
<refsect1 id="R1-SQL-SHOW-2">
|
2000-06-18 23:24:54 +02:00
|
|
|
<title>Examples</title>
|
1999-06-14 09:37:05 +02:00
|
|
|
<para>
|
2003-01-19 01:13:31 +01:00
|
|
|
Show the current <varname>DateStyle</varname> setting:
|
1999-07-14 22:32:59 +02:00
|
|
|
|
2002-08-04 07:09:36 +02:00
|
|
|
<programlisting>
|
1999-06-14 09:37:05 +02:00
|
|
|
SHOW DateStyle;
|
2002-08-04 05:53:11 +02:00
|
|
|
DateStyle
|
|
|
|
---------------------------------------
|
|
|
|
ISO with US (NonEuropean) conventions
|
|
|
|
(1 row)
|
2002-08-04 07:09:36 +02:00
|
|
|
</programlisting>
|
1999-07-14 22:32:59 +02:00
|
|
|
</para>
|
1999-06-14 09:37:05 +02:00
|
|
|
|
1999-07-14 22:32:59 +02:00
|
|
|
<para>
|
2003-01-19 01:13:31 +01:00
|
|
|
Show whether the genetic query optimizer is enabled by displaying
|
|
|
|
the <varname>geqo</varname> setting:
|
2002-08-04 07:09:36 +02:00
|
|
|
<programlisting>
|
1999-06-14 09:37:05 +02:00
|
|
|
SHOW GEQO;
|
2002-08-04 05:53:11 +02:00
|
|
|
geqo
|
|
|
|
------
|
|
|
|
on
|
|
|
|
(1 row)
|
2002-08-04 07:09:36 +02:00
|
|
|
</programlisting>
|
1999-06-14 09:37:05 +02:00
|
|
|
</para>
|
2002-08-04 05:53:11 +02:00
|
|
|
|
|
|
|
<para>
|
|
|
|
Show all settings:
|
2002-08-04 07:46:02 +02:00
|
|
|
<programlisting>
|
2002-08-04 05:53:11 +02:00
|
|
|
SHOW ALL;
|
|
|
|
name | setting
|
|
|
|
-------------------------------+---------------------------------------
|
|
|
|
australian_timezones | off
|
|
|
|
authentication_timeout | 60
|
|
|
|
checkpoint_segments | 3
|
|
|
|
.
|
|
|
|
.
|
|
|
|
.
|
|
|
|
wal_debug | 0
|
|
|
|
wal_sync_method | fdatasync
|
|
|
|
(94 rows)
|
2002-08-04 07:46:02 +02:00
|
|
|
</programlisting>
|
2002-08-04 05:53:11 +02:00
|
|
|
</para>
|
|
|
|
|
1999-06-14 09:37:05 +02:00
|
|
|
</refsect1>
|
|
|
|
|
|
|
|
<refsect1 id="R1-SQL-SHOW-3">
|
2000-06-18 23:24:54 +02:00
|
|
|
<title>Compatibility</title>
|
1999-06-14 09:37:05 +02:00
|
|
|
|
2000-06-18 23:24:54 +02:00
|
|
|
<para>
|
|
|
|
The <command>SHOW</command> command is a
|
2001-12-08 04:24:40 +01:00
|
|
|
<productname>PostgreSQL</productname> extension.
|
2000-06-18 23:24:54 +02:00
|
|
|
</para>
|
1999-06-14 09:37:05 +02:00
|
|
|
</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
|
1999-07-14 22:32:59 +02:00
|
|
|
sgml-local-catalogs:"/usr/lib/sgml/catalog"
|
1999-06-14 09:37:05 +02:00
|
|
|
sgml-local-ecat-files:nil
|
|
|
|
End:
|
|
|
|
-->
|