text: -- Unneeded column is removed from subquery.
  SELECT count() FROM (SELECT number, groupArray(repeat(toString(number), 1000000)) FROM numbers(1000000) GROUP BY number);
  -- Unneeded column cannot be removed from subquery and the query is out of memory
  SELECT count() FROM (SELECT number, groupArray(repeat(toString(number), 1000000)) AS agg FROM numbers(1000000) GROUP BY number HAVING notEmpty(agg)); -- { serverError 241 }
  