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<!--
doc/src/sgml/ref/create_server.sgml
PostgreSQL documentation
-->
<refentry id="sql-createserver">
<indexterm zone="sql-createserver">
<primary>CREATE SERVER</primary>
</indexterm>
<refmeta>
<refentrytitle>CREATE SERVER</refentrytitle>
<manvolnum>7</manvolnum>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>CREATE SERVER</refname>
<refpurpose>define a new foreign server</refpurpose>
</refnamediv>
<refsynopsisdiv>
<synopsis>
CREATE SERVER [ IF NOT EXISTS ] <replaceable class="parameter">server_name</replaceable> [ TYPE '<replaceable class="parameter">server_type</replaceable>' ] [ VERSION '<replaceable class="parameter">server_version</replaceable>' ]
FOREIGN DATA WRAPPER <replaceable class="parameter">fdw_name</replaceable>
[ OPTIONS ( <replaceable class="parameter">option</replaceable> '<replaceable class="parameter">value</replaceable>' [, ... ] ) ]
</synopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para>
<command>CREATE SERVER</command> defines a new foreign server. The
user who defines the server becomes its owner.
</para>
<para>
A foreign server typically encapsulates connection information that
a foreign-data wrapper uses to access an external data resource.
Additional user-specific connection information may be specified by
means of user mappings.
</para>
<para>
The server name must be unique within the database.
</para>
<para>
Creating a server requires <literal>USAGE</literal> privilege on the
foreign-data wrapper being used.
</para>
</refsect1>
<refsect1>
<title>Parameters</title>
<variablelist>
<varlistentry>
<term><literal>IF NOT EXISTS</literal></term>
<listitem>
<para>
Do not throw an error if a server with the same name already exists.
A notice is issued in this case. Note that there is no guarantee that
the existing server is anything like the one that would have been
created.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">server_name</replaceable></term>
<listitem>
<para>
The name of the foreign server to be created.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">server_type</replaceable></term>
<listitem>
<para>
Optional server type, potentially useful to foreign-data wrappers.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">server_version</replaceable></term>
<listitem>
<para>
Optional server version, potentially useful to foreign-data wrappers.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><replaceable class="parameter">fdw_name</replaceable></term>
<listitem>
<para>
The name of the foreign-data wrapper that manages the server.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>OPTIONS ( <replaceable class="parameter">option</replaceable> '<replaceable class="parameter">value</replaceable>' [, ... ] )</literal></term>
<listitem>
<para>
This clause specifies the options for the server. The options
typically define the connection details of the server, but the
actual names and values are dependent on the server's
foreign-data wrapper.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>Notes</title>
<para>
When using the <xref linkend="dblink"/> module,
a foreign server's name can be used
as an argument of the <xref linkend="contrib-dblink-connect"/>
function to indicate the connection parameters. It is necessary to have
the <literal>USAGE</literal> privilege on the foreign server to be
able to use it in this way.
</para>
<para>
If the foreign server supports sort pushdown, it is necessary for it
to have the same sort ordering as the local server.
</para>
</refsect1>
<refsect1>
<title>Examples</title>
<para>
Create a server <literal>myserver</literal> that uses the
foreign-data wrapper <literal>postgres_fdw</literal>:
<programlisting>
CREATE SERVER myserver FOREIGN DATA WRAPPER postgres_fdw OPTIONS (host 'foo', dbname 'foodb', port '5432');
</programlisting>
See <xref linkend="postgres-fdw"/> for more details.
</para>
</refsect1>
<refsect1>
<title>Compatibility</title>
<para>
<command>CREATE SERVER</command> conforms to ISO/IEC 9075-9 (SQL/MED).
</para>
</refsect1>
<refsect1>
<title>See Also</title>
<simplelist type="inline">
<member><xref linkend="sql-alterserver"/></member>
<member><xref linkend="sql-dropserver"/></member>
<member><xref linkend="sql-createforeigndatawrapper"/></member>
<member><xref linkend="sql-createforeigntable"/></member>
<member><xref linkend="sql-createusermapping"/></member>
</simplelist>
</refsect1>
</refentry>
|
