Method append_row

sql/sql_show.cc:3249–3299

}

int select_result_text_buffer::append_row(List<Item> &items, bool send_names)
{
  List_iterator<Item> it(items);
  Item *item;
  char **row;
  int column= 0;

  if (!(row= thd->alloc<char*>(n_columns)) ||
      rows.push_back(row, thd->mem_root))
    return true;

  StringBuffer<32> buf;

  while ((item= it++))
  {
    DBUG_ASSERT(column < n_columns);
    const char *data_ptr; 
    char *ptr;
    size_t data_len;

    buf.set_buffer_if_not_allocated(&my_charset_bin);
    if (send_names)
    {
      DBUG_ASSERT(strlen(item->name.str) == item->name.length);
      data_ptr= item->name.str;
      data_len= item->name.length;
    }
    else
    {
      String *res;
      res= item->val_str(&buf);
      if (item->null_value)
      {
        data_ptr= "NULL";
        data_len=4;
      }
      else
      {
        data_ptr= res->c_ptr_safe();
        data_len= res->length();
      }
    }

    if (!(ptr= (char*) thd->memdup(data_ptr, data_len + 1)))
      return true;
    row[column]= ptr;

    column++;
  }
  return false;
}


void select_result_text_buffer::save_to(String *res)