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 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 be able to SET ROLE to 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. 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 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

allowconn

connlimit

istemplate

new_name

new_owner

new_tablespace

REFRESH COLLATION VERSION

configuration_parameter
value

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))