SHOW
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 18 for details.
Parameters
- name
The name of a run-time parameter. Available parameters are documented in Chapter 18 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)