show(7) [centos man page]
SHOW(7) PostgreSQL 9.2.7 Documentation SHOW(7) 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 Chapter 18, Server Configuration, in the documentation for details. PARAMETERS
name The name of a run-time parameter. Available parameters are documented in Chapter 18, Server Configuration, in the documentation and on the 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 Section 9.26, "System Administration Functions", 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 -------------------------+---------+------------------------------------------------- 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. SEE ALSO
SET(7), RESET(7) PostgreSQL 9.2.7 2014-02-17 SHOW(7)
Check Out this Related Man Page
ALTER
DATABASE(7) PostgreSQL 9.2.7 Documentation ALTER DATABASE(7) NAME
ALTER_DATABASE - change a database SYNOPSIS
ALTER DATABASE name [ [ WITH ] option [ ... ] ] where option can be: CONNECTION LIMIT connlimit ALTER DATABASE name RENAME TO new_name ALTER DATABASE name OWNER TO new_owner ALTER DATABASE name SET TABLESPACE new_tablespace ALTER DATABASE name SET configuration_parameter { TO | = } { value | DEFAULT } ALTER DATABASE name SET configuration_parameter FROM CURRENT ALTER DATABASE name RESET configuration_parameter ALTER DATABASE name RESET ALL DESCRIPTION
ALTER DATABASE changes the attributes of a database. The first form changes certain per-database settings. (See below for details.) Only the database owner or a superuser can change these settings. The second form changes the name of the database. Only the database owner or a superuser can rename a database; non-superuser owners must also have the CREATEDB privilege. The current database cannot be renamed. (Connect to a different database if you need to do that.) The third form changes the owner of the database. To alter the owner, you must own the database and also be a direct or indirect member of the new owning role, and you must have the CREATEDB privilege. (Note that superusers have all these privileges automatically.) The fourth form changes the default tablespace of the database. Only the database owner or a superuser can do this; you must also have create privilege for the new tablespace. This command physically moves any tables or indexes in the database's old default tablespace to the new tablespace. Note that tables and indexes in non-default tablespaces are not affected. The remaining forms change the session default for a run-time configuration variable for a PostgreSQL database. Whenever a new session is subsequently started in that database, the specified value becomes the session default value. The database-specific default overrides whatever setting is present in postgresql.conf or has been received from the postgres command line. Only the database owner or a superuser can change the session defaults for a database. Certain variables cannot be set this way, or can only be set by a superuser. PARAMETERS
name The name of the database whose attributes are to be altered. connlimit How many concurrent connections can be made to this database. -1 means no limit. new_name The new name of the database. new_owner The new owner of the database. new_tablespace The new default tablespace of the database. configuration_parameter, value Set this database's session default for the specified configuration parameter to the given value. If value is DEFAULT or, equivalently, RESET is used, the database-specific setting is removed, so the system-wide default setting will be inherited in new sessions. Use RESET ALL to clear all database-specific settings. SET FROM CURRENT saves the session's current value of the parameter as the database-specific value. See SET(7) and Chapter 18, Server Configuration, in the documentation for more information about allowed parameter names and values. NOTES
It is also possible to tie a session default to a specific role rather than to a database; see ALTER ROLE (ALTER_ROLE(7)). Role-specific settings override database-specific ones if there is a conflict. EXAMPLES
To disable index scans by default in the database test: ALTER DATABASE test SET enable_indexscan TO off; COMPATIBILITY
The ALTER DATABASE statement is a PostgreSQL extension. SEE ALSO
CREATE DATABASE (CREATE_DATABASE(7)), DROP DATABASE (DROP_DATABASE(7)), SET(7), CREATE TABLESPACE (CREATE_TABLESPACE(7)) PostgreSQL 9.2.7 2014-02-17 ALTER DATABASE(7)