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)]