SHOW
SQL - Language Statements
SHOW
show the value of a run-time parameter
SHOW
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 for details.
Parameters
name
The name of a run-time parameter. Available parameters are
documented in and on the 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 .
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.
australian_timezones | off | Interprets ACST, CST, EST, and SAT as Australian time zones.
.
.
.
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