Method add_child

sql/sql_explain.h:136–139

  Dynamic_array<int> children;
public:
  void add_child(int select_no)
  {
    children.append(select_no);
  }

  virtual int print_explain(Explain_query *query, select_result_sink *output, 
                            uint8 explain_flags, bool is_analyze)=0;