Call procedures that return setof, not just text

The output is too deeply nested however

src/PostgREST/App.hs

@@ -168,10 +168,11 @@ app conf reqBody req =
       exists <- doesProcExist schema proc
       if exists
         then do
-          row :: Maybe (Identity Text) <- H.maybeEx $ callProc qi $
-                      fromMaybe M.empty (decode reqBody)
-          return $ responseLBS status200 [textH]
-            (cs $ fromMaybe "" $ runIdentity <$> row)
+          let call = B.Stmt "select " V.empty True <>
+                asJson (callProc qi $ fromMaybe M.empty (decode reqBody))
+          body :: Maybe (Identity Text) <- H.maybeEx call
+          return $ responseLBS status200 [jsonH]
+            (cs $ fromMaybe "[]" $ runIdentity <$> body)
         else return $ responseLBS status404 [] ""
 
       -- check that proc exists

test/fixtures/schema.sql

@@ -217,6 +217,17 @@ ALTER SEQUENCE items_id_seq OWNED BY items.id;
 
 
 
+CREATE FUNCTION "1".getitemrange(min bigint, max bigint) RETURNS SETOF "1".items AS $$
+    SELECT * FROM "1".items WHERE id > $1 AND id <= $2;
+$$ LANGUAGE SQL;
+
+
+
+CREATE FUNCTION "1".sayhello(name text) RETURNS text AS $$
+    SELECT 'Hello, ' || $1;
+$$ LANGUAGE SQL;
+
+
 CREATE TABLE menagerie (
     "integer" integer NOT NULL,
     double double precision NOT NULL,
@@ -521,6 +532,17 @@ GRANT ALL ON TABLE items TO postgrest_test;
 GRANT ALL ON TABLE items TO postgrest_anonymous;
 
 
+REVOKE ALL ON FUNCTION getitemrange(bigint, bigint) FROM PUBLIC;
+REVOKE ALL ON FUNCTION getitemrange(bigint, bigint) FROM postgrest_test;
+GRANT EXECUTE ON FUNCTION getitemrange(bigint, bigint) TO postgrest_test;
+GRANT EXECUTE ON FUNCTION getitemrange(bigint, bigint) TO postgrest_anonymous;
+
+
+REVOKE ALL ON FUNCTION sayhello(text) FROM PUBLIC;
+REVOKE ALL ON FUNCTION sayhello(text) FROM postgrest_test;
+GRANT EXECUTE ON FUNCTION sayhello(text) TO postgrest_test;
+GRANT EXECUTE ON FUNCTION sayhello(text) TO postgrest_anonymous;
+
 
 REVOKE ALL ON SEQUENCE items_id_seq FROM PUBLIC;
 REVOKE ALL ON SEQUENCE items_id_seq FROM postgrest_test;