protected function getGerritCommentByIdentifier($changeSetId, $reviewer, $timestamp, $number)
    {
        $dbHandle = $this->getDatabase()->getDatabaseConnection();

        $query = 'SELECT `id`, `changeset`, `timestamp`, `reviewer`, `message`
                  FROM ' . Database::TABLE_COMMENT . '
                  WHERE `changeset` = :changeset
                        AND `timestamp` = :timestamp
                        AND `reviewer` = :reviewer
                        AND `number` = :number';
        $statement = $dbHandle->prepare($query);

        $statement->bindParam(':changeset', $changeSetId, \PDO::PARAM_INT);
        $statement->bindParam(':timestamp', $timestamp, \PDO::PARAM_INT);
        $statement->bindParam(':reviewer', $reviewer, \PDO::PARAM_INT);
        $statement->bindParam(':number', $number, \PDO::PARAM_STR);
        $executeResult = $statement->execute();

        $statement = $this->getDatabase()->checkQueryError($statement, $executeResult);
        return $statement->fetch(\PDO::FETCH_ASSOC);
    }