Sophie: postgresql8.4-docs-8.4.12-0.1mdv2010.2 i586

postgresql8.4-docs-8.4.12-0.1mdv2010.2.i586.rpm

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML
><HEAD
><TITLE
>pg_settings</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 8.4.12 Documentation"
HREF="index.html"><LINK
REL="UP"
TITLE="System Catalogs"
HREF="catalogs.html"><LINK
REL="PREVIOUS"
TITLE="pg_rules"
HREF="view-pg-rules.html"><LINK
REL="NEXT"
TITLE="pg_shadow"
HREF="view-pg-shadow.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="2012-05-31T23:30:11"></HEAD
><BODY
CLASS="SECT1"
><DIV
CLASS="NAVHEADER"
><TABLE
SUMMARY="Header navigation table"
WIDTH="100%"
BORDER="0"
CELLPADDING="0"
CELLSPACING="0"
><TR
><TH
COLSPAN="5"
ALIGN="center"
VALIGN="bottom"
>PostgreSQL 8.4.12 Documentation</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="view-pg-rules.html"
ACCESSKEY="P"
>Prev</A
></TD
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="top"
><A
HREF="catalogs.html"
>Fast Backward</A
></TD
><TD
WIDTH="60%"
ALIGN="center"
VALIGN="bottom"
>Chapter 44. System Catalogs</TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="top"
><A
HREF="catalogs.html"
>Fast Forward</A
></TD
><TD
WIDTH="10%"
ALIGN="right"
VALIGN="top"
><A
HREF="view-pg-shadow.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="VIEW-PG-SETTINGS"
>44.53. <TT
CLASS="STRUCTNAME"
>pg_settings</TT
></A
></H1
><A
NAME="AEN79212"
></A
><P
>   The view <TT
CLASS="STRUCTNAME"
>pg_settings</TT
> provides access to
   run-time parameters of the server.  It is essentially an alternative
   interface to the <A
HREF="sql-show.html"
><I
>SHOW</I
></A
>
   and <A
HREF="sql-set.html"
><I
>SET</I
></A
> commands.
   It also provides access to some facts about each parameter that are
   not directly available from <TT
CLASS="COMMAND"
>SHOW</TT
>, such as minimum and
   maximum values.
  </P
><DIV
CLASS="TABLE"
><A
NAME="AEN79219"
></A
><P
><B
>Table 44-54. <TT
CLASS="STRUCTNAME"
>pg_settings</TT
> Columns</B
></P
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><COL><THEAD
><TR
><TH
>Name</TH
><TH
>Type</TH
><TH
>Description</TH
></TR
></THEAD
><TBODY
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>name</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Run-time configuration parameter name</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>setting</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Current value of the parameter</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>unit</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Implicit unit of the parameter</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>category</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Logical group of the parameter</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>short_desc</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>A brief description of the parameter</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>extra_desc</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Additional, more detailed, description of the parameter</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>context</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Context required to set the parameter's value</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>vartype</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Parameter type (<TT
CLASS="LITERAL"
>bool</TT
>, <TT
CLASS="LITERAL"
>enum</TT
>,
       <TT
CLASS="LITERAL"
>integer</TT
>, <TT
CLASS="LITERAL"
>real</TT
>, or <TT
CLASS="LITERAL"
>string</TT
>)
      </TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>source</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Source of the current parameter value</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>min_val</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Minimum allowed value of the parameter (NULL for non-numeric
      values)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>max_val</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Maximum allowed value of the parameter (NULL for non-numeric
      values)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>enumvals</TT
></TD
><TD
><TT
CLASS="TYPE"
>text[]</TT
></TD
><TD
>Allowed values of an enum parameter (NULL for non-enum
      values)</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>boot_val</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Parameter value assumed at server startup if the parameter is
      not otherwise set</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>reset_val</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Value that <TT
CLASS="COMMAND"
>RESET</TT
> would reset the parameter to
      in the current session</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>sourcefile</TT
></TD
><TD
><TT
CLASS="TYPE"
>text</TT
></TD
><TD
>Configuration file the current value was set in (NULL for
      values set from sources other than configuration files, or when
      examined by a non-superuser).
      Helpful when using configuration include directives</TD
></TR
><TR
><TD
><TT
CLASS="STRUCTFIELD"
>sourceline</TT
></TD
><TD
><TT
CLASS="TYPE"
>integer</TT
></TD
><TD
>Line number within the configuration file the current value was
      set at (NULL for values set from sources other than configuration files,
      or when examined by a non-superuser)
      </TD
></TR
></TBODY
></TABLE
></DIV
><P
>   The <TT
CLASS="STRUCTNAME"
>pg_settings</TT
> view cannot be inserted into or
   deleted from, but it can be updated.  An <TT
CLASS="COMMAND"
>UPDATE</TT
> applied
   to a row of <TT
CLASS="STRUCTNAME"
>pg_settings</TT
> is equivalent to executing
   the <A
HREF="sql-set.html"
><I
>SET</I
></A
> command on that named
   parameter. The change only affects the value used by the current
   session. If an <TT
CLASS="COMMAND"
>UPDATE</TT
> is issued within a transaction
   that is later aborted, the effects of the <TT
CLASS="COMMAND"
>UPDATE</TT
> command
   disappear when the transaction is rolled back. Once the surrounding
   transaction is committed, the effects will persist until the end of the
   session, unless overridden by another <TT
CLASS="COMMAND"
>UPDATE</TT
> or
   <TT
CLASS="COMMAND"
>SET</TT
>.
  </P
></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="view-pg-rules.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="view-pg-shadow.html"
ACCESSKEY="N"
>Next</A
></TD
></TR
><TR
><TD
WIDTH="33%"
ALIGN="left"
VALIGN="top"
><TT
CLASS="STRUCTNAME"
>pg_rules</TT
></TD
><TD
WIDTH="34%"
ALIGN="center"
VALIGN="top"
><A
HREF="catalogs.html"
ACCESSKEY="U"
>Up</A
></TD
><TD
WIDTH="33%"
ALIGN="right"
VALIGN="top"
><TT
CLASS="STRUCTNAME"
>pg_shadow</TT
></TD
></TR
></TABLE
></DIV
></BODY
></HTML
>