ALTER DATABASE() SQL Commands ALTER DATABASE()NAME
ALTER DATABASE - change a database
SYNOPSIS
ALTER DATABASE name [ [ WITH ] option [ ... ] ]
where option can be:
CONNECTION LIMIT connlimit
ALTER DATABASE name RENAME TO newname
ALTER DATABASE name OWNER TO new_owner
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 set‐
tings.
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 remaining forms change the session default for a run-time configu‐
ration 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 what‐
ever 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.
newname
The new name of the database.
new_owner
The new owner of the database.
configuration_parameter
value Set this database's session default for the specified configura‐
tion 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 set‐
tings. SET FROM CURRENT saves the session's current value of
the parameter as the database-specific value.
See SET [set(7)] and 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 set‐
tings 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(l)],
SET [set(l)]
SQL - Language Statements 2008-02-01 ALTER DATABASE()
