docs: add backend_type to file-fdw CSV log example

bmomjian · bmomjian · commit 0830d21f5b01 · 2020-03-23T18:38:42.000-04:00
backend_type was added to the CVS log output in commit 70a7b47. Reported-by: Fabrízio de Royes Mello Discussion: https://postgr.es/m/CAFcNs+ruvRks3BV1j7yQ-MvxsswmKJa0cVh2yK5Dd-xXVM8wPw@mail.gmail.com Backpatch-through: master
diff --git a/doc/src/sgml/file-fdw.sgml b/doc/src/sgml/file-fdw.sgml
@@ -261,7 +261,8 @@ CREATE FOREIGN TABLE pglog (
   query text,
   query_pos integer,
   location text,
-  application_name text
+  application_name text,
+  backend_type text
 ) SERVER pglog
 OPTIONS ( filename '/home/josh/data/log/pglog.csv', format 'csv' );
 </programlisting>
