Method emit_errors

sql/sql_class.h:2659–2663

  bool has_errors() const { return m_first != nullptr; }

  void emit_errors()
  {
    for (Error_entry *e= m_first; e; e= e->next)
      my_message_sql(e->sql_errno, e->message, MYF(0));
  }

  void clear()
  {