ALTER_DATABASE(7)

1ALTER DATABASE(7)        PostgreSQL 12.2 Documentation       ALTER DATABASE(7)
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NAME

6       ALTER_DATABASE - change a database
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SYNOPSIS

9       ALTER DATABASE name [ [ WITH ] option [ ... ] ]
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11       where option can be:
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13           ALLOW_CONNECTIONS allowconn
14           CONNECTION LIMIT connlimit
15           IS_TEMPLATE istemplate
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17       ALTER DATABASE name RENAME TO new_name
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19       ALTER DATABASE name OWNER TO { new_owner | CURRENT_USER | SESSION_USER }
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21       ALTER DATABASE name SET TABLESPACE new_tablespace
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23       ALTER DATABASE name SET configuration_parameter { TO | = } { value | DEFAULT }
24       ALTER DATABASE name SET configuration_parameter FROM CURRENT
25       ALTER DATABASE name RESET configuration_parameter
26       ALTER DATABASE name RESET ALL
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DESCRIPTION

29       ALTER DATABASE changes the attributes of a database.
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31       The first form changes certain per-database settings. (See below for
32       details.) Only the database owner or a superuser can change these
33       settings.
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35       The second form changes the name of the database. Only the database
36       owner or a superuser can rename a database; non-superuser owners must
37       also have the CREATEDB privilege. The current database cannot be
38       renamed. (Connect to a different database if you need to do that.)
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40       The third form changes the owner of the database. To alter the owner,
41       you must own the database and also be a direct or indirect member of
42       the new owning role, and you must have the CREATEDB privilege. (Note
43       that superusers have all these privileges automatically.)
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45       The fourth form changes the default tablespace of the database. Only
46       the database owner or a superuser can do this; you must also have
47       create privilege for the new tablespace. This command physically moves
48       any tables or indexes in the database's old default tablespace to the
49       new tablespace. The new default tablespace must be empty for this
50       database, and no one can be connected to the database. Tables and
51       indexes in non-default tablespaces are unaffected.
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53       The remaining forms change the session default for a run-time
54       configuration variable for a PostgreSQL database. Whenever a new
55       session is subsequently started in that database, the specified value
56       becomes the session default value. The database-specific default
57       overrides whatever setting is present in postgresql.conf or has been
58       received from the postgres command line. Only the database owner or a
59       superuser can change the session defaults for a database. Certain
60       variables cannot be set this way, or can only be set by a superuser.
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PARAMETERS

63       name
64           The name of the database whose attributes are to be altered.
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66       allowconn
67           If false then no one can connect to this database.
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69       connlimit
70           How many concurrent connections can be made to this database. -1
71           means no limit.
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73       istemplate
74           If true, then this database can be cloned by any user with CREATEDB
75           privileges; if false, then only superusers or the owner of the
76           database can clone it.
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78       new_name
79           The new name of the database.
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81       new_owner
82           The new owner of the database.
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84       new_tablespace
85           The new default tablespace of the database.
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87           This form of the command cannot be executed inside a transaction
88           block.
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90       configuration_parameter
91       value
92           Set this database's session default for the specified configuration
93           parameter to the given value. If value is DEFAULT or, equivalently,
94           RESET is used, the database-specific setting is removed, so the
95           system-wide default setting will be inherited in new sessions. Use
96           RESET ALL to clear all database-specific settings.  SET FROM
97           CURRENT saves the session's current value of the parameter as the
98           database-specific value.
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100           See SET(7) and Chapter 19 for more information about allowed
101           parameter names and values.
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NOTES

104       It is also possible to tie a session default to a specific role rather
105       than to a database; see ALTER ROLE (ALTER_ROLE(7)). Role-specific
106       settings override database-specific ones if there is a conflict.
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EXAMPLES

109       To disable index scans by default in the database test:
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111           ALTER DATABASE test SET enable_indexscan TO off;
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COMPATIBILITY

114       The ALTER DATABASE statement is a PostgreSQL extension.
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