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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >SHOW</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REV="MADE" HREF="mailto:pgsql-docs@postgresql.org"><LINK REL="HOME" TITLE="PostgreSQL 9.2.24 Documentation" HREF="index.html"><LINK REL="UP" TITLE="SQL Commands" HREF="sql-commands.html"><LINK REL="PREVIOUS" TITLE="SET TRANSACTION" HREF="sql-set-transaction.html"><LINK REL="NEXT" TITLE="START TRANSACTION" HREF="sql-start-transaction.html"><LINK REL="STYLESHEET" TYPE="text/css" HREF="stylesheet.css"><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=ISO-8859-1"><META NAME="creation" CONTENT="2017-11-06T22:43:11"></HEAD ><BODY CLASS="REFENTRY" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="5" ALIGN="center" VALIGN="bottom" ><A HREF="index.html" >PostgreSQL 9.2.24 Documentation</A ></TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A TITLE="SET TRANSACTION" HREF="sql-set-transaction.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="10%" ALIGN="left" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="60%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="20%" ALIGN="right" VALIGN="top" ><A TITLE="START TRANSACTION" HREF="sql-start-transaction.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="SQL-SHOW" ></A >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 ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="sql-set-transaction.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="sql-start-transaction.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >SET TRANSACTION</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="sql-commands.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >START TRANSACTION</TD ></TR ></TABLE ></DIV ></BODY ></HTML >