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diff --git a/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml b/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml new file mode 100644 index 0000000..54f34c2 --- /dev/null +++ b/doc/src/sgml/ref/alter_foreign_data_wrapper.sgml @@ -0,0 +1,188 @@ +<!-- +doc/src/sgml/ref/alter_foreign_data_wrapper.sgml +PostgreSQL documentation +--> + +<refentry id="sql-alterforeigndatawrapper"> + <indexterm zone="sql-alterforeigndatawrapper"> + <primary>ALTER FOREIGN DATA WRAPPER</primary> + </indexterm> + + <refmeta> + <refentrytitle>ALTER FOREIGN DATA WRAPPER</refentrytitle> + <manvolnum>7</manvolnum> + <refmiscinfo>SQL - Language Statements</refmiscinfo> + </refmeta> + + <refnamediv> + <refname>ALTER FOREIGN DATA WRAPPER</refname> + <refpurpose>change the definition of a foreign-data wrapper</refpurpose> + </refnamediv> + + <refsynopsisdiv> +<synopsis> +ALTER FOREIGN DATA WRAPPER <replaceable class="parameter">name</replaceable> + [ HANDLER <replaceable class="parameter">handler_function</replaceable> | NO HANDLER ] + [ VALIDATOR <replaceable class="parameter">validator_function</replaceable> | NO VALIDATOR ] + [ OPTIONS ( [ ADD | SET | DROP ] <replaceable class="parameter">option</replaceable> ['<replaceable class="parameter">value</replaceable>'] [, ... ]) ] +ALTER FOREIGN DATA WRAPPER <replaceable class="parameter">name</replaceable> OWNER TO { <replaceable>new_owner</replaceable> | CURRENT_ROLE | CURRENT_USER | SESSION_USER } +ALTER FOREIGN DATA WRAPPER <replaceable class="parameter">name</replaceable> RENAME TO <replaceable>new_name</replaceable> +</synopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para> + <command>ALTER FOREIGN DATA WRAPPER</command> changes the + definition of a foreign-data wrapper. The first form of the + command changes the support functions or the generic options of the + foreign-data wrapper (at least one clause is required). The second + form changes the owner of the foreign-data wrapper. + </para> + + <para> + Only superusers can alter foreign-data wrappers. Additionally, + only superusers can own foreign-data wrappers. + </para> + </refsect1> + + <refsect1> + <title>Parameters</title> + + <variablelist> + <varlistentry> + <term><replaceable class="parameter">name</replaceable></term> + <listitem> + <para> + The name of an existing foreign-data wrapper. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><literal>HANDLER <replaceable class="parameter">handler_function</replaceable></literal></term> + <listitem> + <para> + Specifies a new handler function for the foreign-data wrapper. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><literal>NO HANDLER</literal></term> + <listitem> + <para> + This is used to specify that the foreign-data wrapper should no + longer have a handler function. + </para> + <para> + Note that foreign tables that use a foreign-data wrapper with no + handler cannot be accessed. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><literal>VALIDATOR <replaceable class="parameter">validator_function</replaceable></literal></term> + <listitem> + <para> + Specifies a new validator function for the foreign-data wrapper. + </para> + + <para> + Note that it is possible that pre-existing options of the foreign-data + wrapper, or of dependent servers, user mappings, or foreign tables, are + invalid according to the new validator. <productname>PostgreSQL</productname> does + not check for this. It is up to the user to make sure that these + options are correct before using the modified foreign-data wrapper. + However, any options specified in this <command>ALTER FOREIGN DATA + WRAPPER</command> command will be checked using the new validator. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><literal>NO VALIDATOR</literal></term> + <listitem> + <para> + This is used to specify that the foreign-data wrapper should no + longer have a validator function. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><literal>OPTIONS ( [ ADD | SET | DROP ] <replaceable class="parameter">option</replaceable> ['<replaceable class="parameter">value</replaceable>'] [, ... ] )</literal></term> + <listitem> + <para> + Change options for the foreign-data + wrapper. <literal>ADD</literal>, <literal>SET</literal>, and <literal>DROP</literal> + specify the action to be performed. <literal>ADD</literal> is assumed + if no operation is explicitly specified. Option names must be + unique; names and values are also validated using the foreign + data wrapper's validator function, if any. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><replaceable class="parameter">new_owner</replaceable></term> + <listitem> + <para> + The user name of the new owner of the foreign-data wrapper. + </para> + </listitem> + </varlistentry> + + <varlistentry> + <term><replaceable class="parameter">new_name</replaceable></term> + <listitem> + <para> + The new name for the foreign-data wrapper. + </para> + </listitem> + </varlistentry> + </variablelist> + </refsect1> + + <refsect1> + <title>Examples</title> + + <para> + Change a foreign-data wrapper <literal>dbi</literal>, add + option <literal>foo</literal>, drop <literal>bar</literal>: +<programlisting> +ALTER FOREIGN DATA WRAPPER dbi OPTIONS (ADD foo '1', DROP 'bar'); +</programlisting> + </para> + + <para> + Change the foreign-data wrapper <literal>dbi</literal> validator + to <literal>bob.myvalidator</literal>: +<programlisting> +ALTER FOREIGN DATA WRAPPER dbi VALIDATOR bob.myvalidator; +</programlisting></para> + </refsect1> + + <refsect1> + <title>Compatibility</title> + + <para> + <command>ALTER FOREIGN DATA WRAPPER</command> conforms to ISO/IEC + 9075-9 (SQL/MED), except that the <literal>HANDLER</literal>, + <literal>VALIDATOR</literal>, <literal>OWNER TO</literal>, and <literal>RENAME</literal> + clauses are extensions. + </para> + </refsect1> + + <refsect1> + <title>See Also</title> + + <simplelist type="inline"> + <member><xref linkend="sql-createforeigndatawrapper"/></member> + <member><xref linkend="sql-dropforeigndatawrapper"/></member> + </simplelist> + </refsect1> + +</refentry> |