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SHOW

Name

SHOW -- show the value of a run-time parameter

Synopsis

SHOW nameSHOW 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 postmaster. See Section 16.4 for details.

Parameters

name

The name of a run-time parameter. Available parameters are documented in Section 16.4 and on the SET 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.

Notes

The function current_setting produces equivalent output. See Section 9.20.

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--------------------------------+---------------------------------------------- add_missing_from | on archive_command | unset australian_timezones | off . . . work_mem | 1024 zero_damaged_pages | off(140 rows)

Compatibility

The SHOW command is a PostgreSQL extension.

See Also

SET, RESET
 
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