Add support for Prefer: count=planned/estimated on GET /table (#1386)

test/fixtures/schema.sql

@@ -1096,11 +1096,17 @@ CREATE FUNCTION get_projects_below(id int) RETURNS SETOF projects
     SELECT * FROM test.projects WHERE id < $1;
 $_$;
 
+CREATE FUNCTION get_projects_above(id int) RETURNS SETOF projects
+    LANGUAGE sql
+    AS $_$
+    SELECT * FROM test.projects WHERE id > $1;
+$_$ ROWS 1;
+
 CREATE FUNCTION getallprojects() RETURNS SETOF projects
     LANGUAGE sql
     AS $_$
     SELECT * FROM test.projects;
-$_$;
+$_$ ROWS 2019;
 
 CREATE FUNCTION setprojects(id_l int, id_h int, name text) RETURNS SETOF projects
     LANGUAGE sql
@@ -1730,3 +1736,9 @@ select $$
 </html>
 $$::text;
 $_$ language sql;
+
+create view getallprojects_view as
+select * from getallprojects();
+
+create view get_projects_above_view as
+select * from get_projects_above(1);