ALTER DATABASE
Synopsis
ALTER DATABASEname [ [ WITH ]option [ ... ] ]whereoption can be: CONNECTION LIMITconnlimitALTER DATABASEname RENAME TOnew_nameALTER DATABASEname OWNER TOnew_ownerALTER DATABASEname SET TABLESPACEnew_tablespaceALTER DATABASEname SETconfiguration_parameter { TO | = } {value | DEFAULT }ALTER DATABASEname SETconfiguration_parameter FROM CURRENTALTER DATABASEname RESETconfiguration_parameterALTER DATABASEname RESET ALLDescription
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 theCREATEDB 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 theCREATEDB 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 aPostgreSQL 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 inpostgresql.conf or has been received from thepostgres 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. Ifvalue isDEFAULT or, equivalently,RESET is used, the database-specific setting is removed, so the system-wide default setting will be inherited in new sessions. UseRESET ALL to clear all database-specific settings.SET FROM CURRENT saves the session's current value of the parameter as the database-specific value.
SeeSET andChapter 18 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; seeALTER ROLE. Role-specific settings override database-specific ones if there is a conflict.