ALTER DATABASE — change a database
ALTER DATABASEname[ [ WITH ]option[ ... ] ] whereoptioncan be: CONNECTION LIMITconnlimitALTER DATABASEnameSETparameter{ TO | = } {value| DEFAULT } ALTER DATABASEnameRESETparameterALTER DATABASEnameRENAME TOnewnameALTER DATABASEnameOWNER TOnew_owner
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 and third 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
postmaster 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.
The fourth 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 fifth 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.)
nameThe name of the database whose attributes are to be altered.
connlimitHow many concurrent connections can be made to this database. -1 means no limit.
parametervalue
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.
See SET and Chapter 17, Server Configuration for more information about allowed parameter names and values.
newnameThe new name of the database.
new_ownerThe new owner of the database.
It is also possible to tie a session default to a specific user rather than to a database; see ALTER USER. User-specific settings override database-specific ones if there is a conflict.