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show

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. 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 initdb 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 initdb time.

IS_SUPERUSER

True if the current session authorization identifier 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.

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.

 archive_command                | unset                          | WAL archiving command.

    .

    .

    .

 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(l)]