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6ef2448796
There is what may actually be a mistake in our markup. The problem is in a situation like <para> <command>FOO</command> is ... there is strictly speaking a line break before "FOO". In the HTML output, this does not appear to be a problem, but in the man page output, this shows up, so you get double blank lines at odd places. So far, we have attempted to work around this with an XSL hack, but that causes other problems, such as creating run-ins in places like <acronym>SQL</acronym> <command>COPY</command> So fix the problem properly by removing the extra whitespace. I only fixed the problems that affect the man page output, not all the places.
216 lines
6.8 KiB
Plaintext
216 lines
6.8 KiB
Plaintext
<!--
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doc/src/sgml/ref/alter_database.sgml
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PostgreSQL documentation
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-->
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<refentry id="SQL-ALTERDATABASE">
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<refmeta>
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<refentrytitle>ALTER DATABASE</refentrytitle>
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<manvolnum>7</manvolnum>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>ALTER DATABASE</refname>
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<refpurpose>change a database</refpurpose>
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</refnamediv>
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<indexterm zone="sql-alterdatabase">
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<primary>ALTER DATABASE</primary>
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</indexterm>
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<refsynopsisdiv>
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<synopsis>
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> [ [ WITH ] <replaceable class="PARAMETER">option</replaceable> [ ... ] ]
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<phrase>where <replaceable class="PARAMETER">option</replaceable> can be:</phrase>
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CONNECTION LIMIT <replaceable class="PARAMETER">connlimit</replaceable>
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> RENAME TO <replaceable>new_name</replaceable>
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> OWNER TO <replaceable>new_owner</replaceable>
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> SET TABLESPACE <replaceable class="PARAMETER">new_tablespace</replaceable>
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> SET <replaceable>configuration_parameter</replaceable> { TO | = } { <replaceable>value</replaceable> | DEFAULT }
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> SET <replaceable>configuration_parameter</replaceable> FROM CURRENT
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> RESET <replaceable>configuration_parameter</replaceable>
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ALTER DATABASE <replaceable class="PARAMETER">name</replaceable> RESET ALL
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</synopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>
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<command>ALTER DATABASE</command> changes the attributes
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of a database.
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</para>
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<para>
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The first form changes certain per-database settings. (See below for
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details.) Only the database owner or a superuser can change these settings.
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</para>
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<para>
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The second form changes the name of the database. Only the database
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owner or a superuser can rename a database; non-superuser owners must
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also have the
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<literal>CREATEDB</literal> privilege. The current database cannot
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be renamed. (Connect to a different database if you need to do
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that.)
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</para>
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<para>
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The third form changes the owner of the database.
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To alter the owner, you must own the database and also be a direct or
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indirect member of the new owning role, and you must have the
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<literal>CREATEDB</literal> privilege.
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(Note that superusers have all these privileges automatically.)
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</para>
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<para>
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The fourth form changes the default tablespace of the database.
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Only the database owner or a superuser can do this; you must also have
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create privilege for the new tablespace.
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This command physically moves any tables or indexes in the database's old
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default tablespace to the new tablespace. Note that tables and indexes
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in non-default tablespaces are not affected.
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</para>
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<para>
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The remaining forms change the session default for a run-time
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configuration variable for a <productname>PostgreSQL</productname>
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database. Whenever a new session is subsequently started in that
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database, the specified value becomes the session default value.
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The database-specific default overrides whatever setting is present
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in <filename>postgresql.conf</> or has been received from the
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<command>postgres</command> command line. Only the database
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owner or a superuser can change the session defaults for a
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database. Certain variables cannot be set this way, or can only be
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set by a superuser.
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</para>
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</refsect1>
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<refsect1>
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<title>Parameters</title>
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<variablelist>
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<varlistentry>
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<term><replaceable class="PARAMETER">name</replaceable></term>
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<listitem>
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<para>
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The name of the database whose attributes are to be altered.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">connlimit</replaceable></term>
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<listitem>
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<para>
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How many concurrent connections can be made
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to this database. -1 means no limit.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>new_name</replaceable></term>
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<listitem>
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<para>
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The new name of the database.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">new_owner</replaceable></term>
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<listitem>
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<para>
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The new owner of the database.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="parameter">new_tablespace</replaceable></term>
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<listitem>
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<para>
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The new default tablespace of the database.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable>configuration_parameter</replaceable></term>
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<term><replaceable>value</replaceable></term>
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<listitem>
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<para>
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Set this database's session default for the specified configuration
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parameter to the given value. If
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<replaceable>value</replaceable> is <literal>DEFAULT</literal>
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or, equivalently, <literal>RESET</literal> is used, the
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database-specific setting is removed, so the system-wide default
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setting will be inherited in new sessions. Use <literal>RESET
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ALL</literal> to clear all database-specific settings.
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<literal>SET FROM CURRENT</> saves the session's current value of
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the parameter as the database-specific value.
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</para>
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<para>
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See <xref linkend="sql-set"> and <xref linkend="runtime-config">
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for more information about allowed parameter names
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and values.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para>
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It is also possible to tie a session default to a specific role
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rather than to a database; see
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<xref linkend="sql-alterrole">.
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Role-specific settings override database-specific
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ones if there is a conflict.
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</para>
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</refsect1>
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<refsect1>
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<title>Examples</title>
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<para>
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To disable index scans by default in the database
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<literal>test</literal>:
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<programlisting>
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ALTER DATABASE test SET enable_indexscan TO off;
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</programlisting></para>
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</refsect1>
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<refsect1>
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<title>Compatibility</title>
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<para>
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The <command>ALTER DATABASE</command> statement is a
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<productname>PostgreSQL</productname> extension.
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</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<simplelist type="inline">
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<member><xref linkend="sql-createdatabase"></member>
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<member><xref linkend="sql-dropdatabase"></member>
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<member><xref linkend="sql-set"></member>
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<member><xref linkend="sql-createtablespace"></member>
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</simplelist>
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</refsect1>
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</refentry>
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