...
IF tg_op = 'UPDATE' AND ful_table_name != 'front.rest' THEN

  -- Проверим изменилось ли что-то в строках
  IF ROW(NEW.*) IS DISTINCT FROM ROW(OLD.*) THEN
    -- Изменилось, меняем дату.
  ELSE
    -- Ничего не менялось, выходим.
    RETURN new;
  END IF;
 
END IF;
...

ServerDataRecipient::loadCheck : ошибка = ERROR:  operator does not exist: hstore = hstore
СТРОКА 1: SELECT  ROW( $1 .*) IS DISTINCT FROM ROW( $2 .*)
                              ^
ПОДСКАЗКА:  No operator matches the given name and argument type(s). You might need to add explicit type casts.
ЗАПРОС:  SELECT  ROW( $1 .*) IS DISTINCT FROM ROW( $2 .*)
КОНТЕКСТ:  PL/pgSQL function "return_time_change" line 15 at IF
QPSQL: Невозможно создать запрос

=> show search_path;
search_path
----------------
 "$user",public

=> select setting::int FROM pg_settings WHERE name = 'server_version_num';
 setting 
---------
   80421

=> select '1=>2'::hstore = '2=>3'::hstore;
ERROR:  operator does not exist: hstore = hstore
СТРОКА 1: select '1=>2'::hstore = '2=>3'::hstore;
                                ^
ПОДСКАЗКА:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

=> select row(2, '1=>2'::hstore) is distinct from row(2, '1=>2'::hstore);
ERROR:  operator does not exist: hstore = hstore
СТРОКА 1: select row(2, '1=>2'::hstore) is distinct from row(2, '1=>2'...
                                        ^
ПОДСКАЗКА:  No operator matches the given name and argument type(s). You might need to add explicit type casts.