Method send_explain_fields

sql/sql_class.cc:3009–3019

int THD::send_explain_fields(select_result *result,
                             uint8 explain_flags,
                             bool is_analyze)
{
  List<Item> field_list;
  int rc;
  rc= prepare_explain_fields(result, &field_list, explain_flags, is_analyze) ||
      result->send_result_set_metadata(field_list, Protocol::SEND_NUM_ROWS |
                                                   Protocol::SEND_EOF);
  return rc;
}


void THD::make_explain_json_field_list(List<Item> &field_list, bool is_analyze)