SHOW
SHOW
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
Chapter 19
for details.
Parameters
-
name -
The name of a run-time parameter. Available parameters are documented in Chapter 19 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 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
Section 9.26
.
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
-------------------------+---------+-------------------------------------------------
allow_system_table_mods | off | Allows modifications of the structure of ...
.
.
.
xmloption | content | Sets whether XML data in implicit parsing ...
zero_damaged_pages | off | Continues processing past damaged page headers.
(196 rows)
Compatibility
The
SHOW
command is a
PostgreSQL
extension.