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>PostgreSQL 8.3.6 Documentation</TH
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><H1
><A
NAME="SQL-ALTERDATABASE"
></A
>ALTER DATABASE</H1
><DIV
CLASS="REFNAMEDIV"
><A
NAME="AEN48161"
></A
><H2
>Name</H2
>ALTER DATABASE -- change a database</DIV
><A
NAME="AEN48164"
></A
><DIV
CLASS="REFSYNOPSISDIV"
><A
NAME="AEN48166"
></A
><H2
>Synopsis</H2
><PRE
CLASS="SYNOPSIS"
>ALTER DATABASE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> [ [ WITH ] <TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
> [ ... ] ]
where <TT
CLASS="REPLACEABLE"
><I
>option</I
></TT
> can be:
CONNECTION LIMIT <TT
CLASS="REPLACEABLE"
><I
>connlimit</I
></TT
>
ALTER DATABASE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> RENAME TO <TT
CLASS="REPLACEABLE"
><I
>newname</I
></TT
>
ALTER DATABASE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> OWNER TO <TT
CLASS="REPLACEABLE"
><I
>new_owner</I
></TT
>
ALTER DATABASE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> SET <TT
CLASS="REPLACEABLE"
><I
>configuration_parameter</I
></TT
> { TO | = } { <TT
CLASS="REPLACEABLE"
><I
>value</I
></TT
> | DEFAULT }
ALTER DATABASE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> SET <TT
CLASS="REPLACEABLE"
><I
>configuration_parameter</I
></TT
> FROM CURRENT
ALTER DATABASE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> RESET <TT
CLASS="REPLACEABLE"
><I
>configuration_parameter</I
></TT
>
ALTER DATABASE <TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
> RESET ALL</PRE
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN48184"
></A
><H2
>Description</H2
><P
> <TT
CLASS="COMMAND"
>ALTER DATABASE</TT
> changes the attributes
of a database.
</P
><P
> The first form changes certain per-database settings. (See below for
details.) Only the database owner or a superuser can change these settings.
</P
><P
> 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
<TT
CLASS="LITERAL"
>CREATEDB</TT
> privilege. The current database cannot
be renamed. (Connect to a different database if you need to do
that.)
</P
><P
> 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 the
<TT
CLASS="LITERAL"
>CREATEDB</TT
> privilege.
(Note that superusers have all these privileges automatically.)
</P
><P
> The remaining forms change the session default for a run-time
configuration variable for a <SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
>
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 <TT
CLASS="FILENAME"
>postgresql.conf</TT
> or has been received from the
<TT
CLASS="COMMAND"
>postgres</TT
> 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.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN48197"
></A
><H2
>Parameters</H2
><P
></P
><DIV
CLASS="VARIABLELIST"
><DL
><DT
><TT
CLASS="REPLACEABLE"
><I
>name</I
></TT
></DT
><DD
><P
> The name of the database whose attributes are to be altered.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>connlimit</I
></TT
></DT
><DD
><P
> How many concurrent connections can be made
to this database. -1 means no limit.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>newname</I
></TT
></DT
><DD
><P
> The new name of the database.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>new_owner</I
></TT
></DT
><DD
><P
> The new owner of the database.
</P
></DD
><DT
><TT
CLASS="REPLACEABLE"
><I
>configuration_parameter</I
></TT
><BR><TT
CLASS="REPLACEABLE"
><I
>value</I
></TT
></DT
><DD
><P
> Set this database's session default for the specified configuration
parameter to the given value. If
<TT
CLASS="REPLACEABLE"
><I
>value</I
></TT
> is <TT
CLASS="LITERAL"
>DEFAULT</TT
>
or, equivalently, <TT
CLASS="LITERAL"
>RESET</TT
> is used, the
database-specific setting is removed, so the system-wide default
setting will be inherited in new sessions. Use <TT
CLASS="LITERAL"
>RESET
ALL</TT
> to clear all database-specific settings.
<TT
CLASS="LITERAL"
>SET FROM CURRENT</TT
> saves the session's current value of
the parameter as the database-specific value.
</P
><P
> See <A
HREF="sql-set.html"
><I
>SET</I
></A
> and <A
HREF="runtime-config.html"
>Chapter 18</A
>
for more information about allowed parameter names
and values.
</P
></DD
></DL
></DIV
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN48235"
></A
><H2
>Notes</H2
><P
> It is also possible to tie a session default to a specific role
rather than to a database; see
<A
HREF="sql-alterrole.html"
><I
>ALTER ROLE</I
></A
>.
Role-specific settings override database-specific
ones if there is a conflict.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN48239"
></A
><H2
>Examples</H2
><P
> To disable index scans by default in the database
<TT
CLASS="LITERAL"
>test</TT
>:
</P><PRE
CLASS="PROGRAMLISTING"
>ALTER DATABASE test SET enable_indexscan TO off;</PRE
><P>
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN48244"
></A
><H2
>Compatibility</H2
><P
> The <TT
CLASS="COMMAND"
>ALTER DATABASE</TT
> statement is a
<SPAN
CLASS="PRODUCTNAME"
>PostgreSQL</SPAN
> extension.
</P
></DIV
><DIV
CLASS="REFSECT1"
><A
NAME="AEN48249"
></A
><H2
>See Also</H2
><A
HREF="sql-createdatabase.html"
><I
>CREATE DATABASE</I
></A
>, <A
HREF="sql-dropdatabase.html"
><I
>DROP DATABASE</I
></A
>, <A
HREF="sql-set.html"
><I
>SET</I
></A
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distrib
>
Mandriva
>
2008.1
>
x86_64
>
media
>
main-testing
>
by-pkgid
>
bab02a23fa9f3df8d66a9a3231b50245
>
files
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697
