ALTER DATABASE(7) PostgreSQL 18.6 Documentation ALTER DATABASE(7) NAME ALTER_DATABASE - change a database SYNOPSIS ALTER DATABASE name [ [ WITH ] option [ ... ] ] where option can be: ALLOW_CONNECTIONS allowconn CONNECTION LIMIT connlimit IS_TEMPLATE istemplate ALTER DATABASE name RENAME TO new_name ALTER DATABASE name OWNER TO { new_owner | CURRENT_ROLE | CURRENT_USER | SESSION_USER } ALTER DATABASE name SET TABLESPACE new_tablespace ALTER DATABASE name REFRESH COLLATION VERSION 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 de- tails.) 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 be able to SET ROLE to the new owning role, and you must have the CRE- ATEDB privilege. (Note that superusers have all these privileges automati- cally.) 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 privi- lege for the new tablespace. This command physically moves any tables or indexes in the database's old default tablespace to the new tablespace. The new default tablespace must be empty for this database, and no one can be connected to the database. Tables and indexes in non-default tablespaces are unaffected. The method used to copy files to the new tablespace is af- fected by the file_copy_method setting. 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. allowconn If false then no one can connect to this database. connlimit How many concurrent connections can be made to this database. -1 means no limit. istemplate If true, then this database can be cloned by any user with CREATEDB privileges; if false, then only superusers or the owner of the database can clone it. 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. This form of the command cannot be executed inside a transaction block. REFRESH COLLATION VERSION Update the database collation version. See Notes for background. configuration_parameter value Set this database's session default for the specified configuration pa- rameter 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 ses- sion's current value of the parameter as the database-specific value. See SET(7) and Chapter 19 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 over- ride 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 18.6 2026 ALTER DATABASE(7)
NAME | SYNOPSIS | DESCRIPTION | PARAMETERS | NOTES | EXAMPLES | COMPATIBILITY | SEE ALSO
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