Support for MOVE in PL/PgSQL. Initial patch from Magnus, some improvements

by Pavel Stehule, and reviewed by Neil Conway.

src/test/regress/sql/plpgsql.sql

@@ -2511,4 +2511,27 @@ $$ language plpgsql;
 
 select * from sc_test();
 
+create or replace function sc_test() returns setof integer as $$
+declare
+  c cursor for select * from generate_series(1, 10);
+  x integer;
+begin
+  open c;
+  loop
+      move relative 2 in c;
+      if not found then
+          exit;
+      end if;
+      fetch next from c into x;
+      if found then
+          return next x;
+      end if;
+  end loop;
+  close c;
+end;
+$$ language plpgsql;
+
+select * from sc_test();
+
 drop function sc_test();
+