show

Langue: en

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Version: 2010-07-20 (ubuntu - 25/10/10)

Autres sections - même nom

Section: 7 (Divers)

Sommaire

NAME

SHOW - show the value of a run-time parameter

SYNOPSIS

 SHOW name
 SHOW ALL

DESCRIPTION

SHOW will display the current setting of run-time parameters. These variables can be set using the SET statement, by editing the postgresql.conf configuration file, through the PGOPTIONS environmental variable (when using libpq or a libpq-based application), or through command-line flags when starting the postgres server. See in the documentation for details.

PARAMETERS

name
The name of a run-time parameter. Available parameters are documented in in the documentation and on the SET [set(7)] reference page. In addition, there are a few parameters that can be shown but not set:
SERVER_VERSION
Shows the server's version number.
SERVER_ENCODING
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.
LC_COLLATE
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.
LC_CTYPE
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.
IS_SUPERUSER
True if the current role has superuser privileges.
ALL
Show the values of all configuration parameters, with descriptions.

NOTES

The function current_setting produces equivalent output; see in the documentation. Also, the pg_settings system view produces the same information.

EXAMPLES

Show the current setting of the parameter DateStyle:

 SHOW DateStyle;
  DateStyle
 -----------
  ISO, MDY
 (1 row)

Show the current setting of the parameter geqo:

 SHOW geqo;
  geqo
 ------
  on
 (1 row)

Show all settings:

 SHOW ALL;
               name              |            setting             |                                         description                                          
 --------------------------------+--------------------------------+----------------------------------------------------------------------------------------------
  add_missing_from               | off                            | Automatically adds missing table references to FROM clauses.
  allow_system_table_mods        | off                            | Allows modifications of the structure of system tables.
     .
     .
     .
  work_mem                       | 1024                           | Sets the maximum memory to be used for query workspaces.
  zero_damaged_pages             | off                            | Continues processing past damaged page headers.
 (146 rows)

COMPATIBILITY

The SHOW command is a PostgreSQL extension.

SEE ALSO

SET [set(7)], RESET [reset(7)]