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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 postmaster. See the section called ’’Run-time Configuration’’ in the documentation for details.

PARAMETERS

name

The name of a run-time parameter. Available parameters are documented in the section called ’’Run-time Configuration’’ 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 configurations parameters.

NOTES

The function current_setting produces equivalent output. See the section called ’’Miscellaneous Functions’’ 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
-------------------------------+---------------------------------------
australian_timezones | off
authentication_timeout | 60
checkpoint_segments | 3
.
.
.
wal_debug | 0
wal_sync_method | fdatasync
(94 rows)

COMPATIBILITY

The SHOW command is a PostgreSQL extension.

SEE ALSO

SET [set(7)]