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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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><H1
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>SHOW</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN79193"
></A
><H2
>Name</H2
>SHOW -- show the value of a run-time parameter</DIV
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN79198"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>SHOW <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
>
SHOW ALL</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN79201"
></A
><H2
>Description</H2
><P
> <TT
CLASS="COMMAND"
>SHOW</TT
> will display the current setting of
run-time parameters. These variables can be set using the
<TT
CLASS="COMMAND"
>SET</TT
> statement, by editing the
<TT
CLASS="FILENAME"
>postgresql.conf</TT
> configuration file, through
the <TT
CLASS="ENVAR"
>PGOPTIONS</TT
> environmental variable (when using
<SPAN
CLASS="APPLICATION"
>libpq</SPAN
> or a <SPAN
CLASS="APPLICATION"
>libpq</SPAN
>-based
application), or through command-line flags when starting the
<TT
CLASS="COMMAND"
>postgres</TT
> server. See <A
HREF="runtime-config.html"
>Chapter 18</A
> for details.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN79212"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
></DT
><DD
><P
> The name of a run-time parameter. Available parameters are
documented in <A
HREF="runtime-config.html"
>Chapter 18</A
> and on the <A
HREF="sql-set.html"
>SET</A
> reference page. In
addition, there are a few parameters that can be shown but not
set:
<P
></P
></P><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="LITERAL"
>SERVER_VERSION</TT
></DT
><DD
><P
> Shows the server's version number.
</P
></DD
><DT
><TT
CLASS="LITERAL"
>SERVER_ENCODING</TT
></DT
><DD
><P
> Shows the server-side character set encoding. At present,
this parameter can be shown but not set, because the
encoding is determined at database creation time.
</P
></DD
><DT
><TT
CLASS="LITERAL"
>LC_COLLATE</TT
></DT
><DD
><P
> 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 database creation
time.
</P
></DD
><DT
><TT
CLASS="LITERAL"
>LC_CTYPE</TT
></DT
><DD
><P
> Shows the database's locale setting for character
classification. At present, this parameter can be shown but
not set, because the setting is determined at database creation
time.
</P
></DD
><DT
><TT
CLASS="LITERAL"
>IS_SUPERUSER</TT
></DT
><DD
><P
> True if the current role has superuser privileges.
</P
></DD
></DL
></DIV
><P></P
></DD
><DT
><TT
CLASS="LITERAL"
>ALL</TT
></DT
><DD
><P
> Show the values of all configuration parameters, with descriptions.
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN79253"
></A
><H2
>Notes</H2
><P
> The function <CODE
CLASS="FUNCTION"
>current_setting</CODE
> produces
equivalent output; see <A
HREF="functions-admin.html"
>Section 9.26</A
>.
Also, the
<A
HREF="view-pg-settings.html"
><TT
CLASS="STRUCTNAME"
>pg_settings</TT
></A
>
system view produces the same information.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN79260"
></A
><H2
>Examples</H2
><P
> Show the current setting of the parameter <TT
CLASS="VARNAME"
>DateStyle</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>SHOW DateStyle;
DateStyle
-----------
ISO, MDY
(1 row)</PRE
><P>
</P
><P
> Show the current setting of the parameter <TT
CLASS="VARNAME"
>geqo</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>SHOW geqo;
geqo
------
on
(1 row)</PRE
><P>
</P
><P
> Show all settings:
</P><PRE
CLASS="PROGRAMLISTING"
>SHOW ALL;
name | setting | description
-------------------------+---------+-------------------------------------------------
allow_system_table_mods | off | Allows modifications of the structure of ...
.
.
.
xmloption | content | Sets whether XML data in implicit parsing ...
zero_damaged_pages | off | Continues processing past damaged page headers.
(196 rows)</PRE
><P></P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN79270"
></A
><H2
>Compatibility</H2
><P
> The <TT
CLASS="COMMAND"
>SHOW</TT
> command is a
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> extension.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN79275"
></A
><H2
>See Also</H2
><A
HREF="sql-set.html"
>SET</A
>, <A
HREF="sql-reset.html"
>RESET</A
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