2 $PostgreSQL: pgsql/doc/src/sgml/ref/alter_database.sgml,v 1.15 2005/01/05 14:22:39 petere Exp $
3 PostgreSQL documentation
6 <refentry id="SQL-ALTERDATABASE">
8 <refentrytitle id="sql-alterdatabase-title">ALTER DATABASE</refentrytitle>
9 <refmiscinfo>SQL - Language Statements</refmiscinfo>
13 <refname>ALTER DATABASE</refname>
14 <refpurpose>change a database</refpurpose>
17 <indexterm zone="sql-alterdatabase">
18 <primary>ALTER DATABASE</primary>
23 ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> SET <replaceable>parameter</replaceable> { TO | = } { <replaceable>value</replaceable> | DEFAULT }
24 ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> RESET <replaceable>parameter</replaceable>
26 ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> RENAME TO <replaceable>newname</replaceable>
28 ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> OWNER TO <replaceable>new_owner</replaceable>
33 <title>Description</title>
36 <command>ALTER DATABASE</command> changes the attributes
41 The first two forms change the session default for a run-time
42 configuration variable for a <productname>PostgreSQL</productname>
43 database. Whenever a new session is subsequently started in that
44 database, the specified value becomes the session default value.
45 The database-specific default overrides whatever setting is present
46 in <filename>postgresql.conf</> or has been received from the
47 <command>postmaster</command> command line. Only the database
48 owner or a superuser can change the session defaults for a
49 database. Certain variables cannot be set this way, or can only be
54 The third form changes the name of the database. Only the database
55 owner or a superuser can rename a database; non-superuser owners must
57 <literal>CREATEDB</literal> privilege. The current database cannot
58 be renamed. (Connect to a different database if you need to do
63 The fourth form changes the owner of the database. Only a superuser
64 can change the database's owner.
69 <title>Parameters</title>
73 <term><replaceable class="PARAMETER">name</replaceable></term>
76 The name of the database whose attributes are to be altered.
82 <term><replaceable>parameter</replaceable></term>
83 <term><replaceable>value</replaceable></term>
86 Set this database's session default for the specified configuration
87 parameter to the given value. If
88 <replaceable>value</replaceable> is <literal>DEFAULT</literal>
89 or, equivalently, <literal>RESET</literal> is used, the
90 database-specific setting is removed, so the system-wide default
91 setting will be inherited in new sessions. Use <literal>RESET
92 ALL</literal> to clear all database-specific settings.
96 See <xref linkend="sql-set" endterm="sql-set-title"> and <xref linkend="runtime-config">
97 for more information about allowed parameter names
104 <term><replaceable>newname</replaceable></term>
107 The new name of the database.
113 <term><replaceable class="parameter">new_owner</replaceable></term>
116 The new owner of the database.
127 It is also possible to tie a session default to a specific user
128 rather than to a database; see
129 <xref linkend="sql-alteruser" endterm="sql-alteruser-title">.
130 User-specific settings override database-specific
131 ones if there is a conflict.
136 <title>Examples</title>
139 To disable index scans by default in the database
140 <literal>test</literal>:
143 ALTER DATABASE test SET enable_indexscan TO off;
149 <title>Compatibility</title>
152 The <command>ALTER DATABASE</command> statement is a
153 <productname>PostgreSQL</productname> extension.
158 <title>See Also</title>
160 <simplelist type="inline">
161 <member><xref linkend="sql-createdatabase" endterm="sql-createdatabase-title"></member>
162 <member><xref linkend="sql-dropdatabase" endterm="sql-dropdatabase-title"></member>
163 <member><xref linkend="sql-set" endterm="sql-set-title"></member>
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