Fix corner case (no tables) in CDB_UserDataSize #65

scripts-available/CDB_Quota.sql

@@ -33,7 +33,11 @@ BEGIN
   )
   SELECT sum(table_size*multiplier)::int8 INTO total_size FROM sizes;
 
+  IF total_size IS NOT NULL THEN
     RETURN total_size;
+  ELSE
+    RETURN 0;
+  END IF;
 END;
 $$
 LANGUAGE 'plpgsql' VOLATILE;