Boolean option.  If true, it specifies that values of the
     column which match the null string are returned as <literal>NULL</literal>
     even if the value is quoted. Without this option, only unquoted
     values matching the null string are returned as <literal>NULL</literal>.
     This has the same effect  as listing the column in
     <command>COPY</command>'s <literal>FORCE_NULL</literal> option.
    </para>
   </listitem>
  </varlistentry>

 </variablelist>

 <para>
  <command>COPY</command>'s <literal>FORCE_QUOTE</literal> option is
  currently not supported by <literal>file_fdw</literal>.
 </para>

 <para>
  These options can only be specified for a foreign table or its columns, not
  in the options of the <literal>file_fdw</literal> foreign-data wrapper, nor in the
  options of a server or user mapping using the wrapper.
 </para>

 <para>
  Changing table-level options requires being a superuser or having the privileges
  of the role <literal>pg_read_server_files</literal> (to use a filename) or
  the role <literal>pg_execute_server_program</literal> (to use a program),
  for security reasons: only certain users should be able to control which file is
  read or which program is run.  In principle regular users could be allowed to
  change the other options, but that's not supported at present.
 </para>

 <para>
  When specifying the <literal>program</literal> option, keep in mind that the option
  string is executed by the shell.  If you need to pass any arguments to the
  command that come from an untrusted source, you must be careful to strip or
  escape any characters that might have special meaning to the shell.
  For security reasons, it is best to use a fixed command string, or at least
  avoid passing any user input in it.
 </para>

 <para>
  For a foreign table using <literal>file_fdw</literal>, <command>EXPLAIN</command> shows
  the name of the file to be read or program to be run.
  For a file, unless <literal>COSTS OFF</literal> is
  specified, the file size (in bytes) is shown as well.
 </para>

 <example>
  <title>Create a Foreign Table for PostgreSQL CSV Logs</title>

  <para>
   One of the obvious